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A - occupational safety and health
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B - physics, chemistry and natural phenomena
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C - inorganic chemicals
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D - organic compounds
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E - enzymes
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F - natural products and substances
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G - industrial products
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H - equipment, workplaces and operations
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I - equipment, workplaces and operations (2)
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J - equipment, workplaces and operations (3)
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K - work and industrial organization
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L - fire, explosions
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M - occupational pathology
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N - occupational pathology (cont.)
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P - physiology, anatomy, psychology
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Q - measurement and investigation
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Qa - measurement of physical agents
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Qd - image analysis
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Qe - sampling and analysis
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Qea - air sampling
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Qef - sampling methods
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Qefa - absorption sampling
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Qefd - adsorption sampling
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Qefde - desorption efficiency
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Qefe - sampling in evacuated bottles
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Qeff - filtration sampling
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Qefi - impaction sampling
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Qefic - cascade impactor sampling
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Qefik - konimeter sampling
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Qefj - impingement sampling
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Qefjm - midget impinger sampling
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Qefm - microsampling
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Qefn - centrifugal sampling
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Qefo - gravimetric sampling
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Qefos - sedimentation sampling
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Qefp - precipitation sampling
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Qefpe - electrostatic precipitator sampling
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Qefpo - thermal precipitator sampling
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Qefu - personal sampling
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Qefub - passive dosimeters
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Qefx - snap sampling
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Qefy - continuous sampling
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Qeg - sampling instruments
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Qegi - inlet geometry
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Qego - sampling pumps
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Qel - location of sampling points
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Qem - microscopic determination
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Qeme - electron microscopy
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Qemes - scanning electron microscopy
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Qemet - transmission electron microscopy
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Qemf - electron microprobe analysis
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Qemi - interference microscopy
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Qemo - light microscopy
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Qemop - phase-contrast microscopy
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Qemor - polarized light microscopy
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Qemp - microprojection
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Qep - dust measurement
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Qepa - particle size determination
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Qepb - particle volume determination
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Qepc - particle surface-area determination
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Qepe - number concentration determination
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Qepec - condensation nucleus counting
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Qepeo - optical particle counters
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Qepf - fibre counts
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Qepfi - image analyzers
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Qeph - mass concentration determination
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Qepi - size distribution determination
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Qepie - electrical aerosol analysis
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Qepy - dust measuring instruments
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Qepyb - sedimentation balance
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Qepye - electronic dust analyzer
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Qepyi - ionization dust analyzer
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Qepyp - aerosol photometer
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Qepypt - tyndalloscope
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Qepys - size selectors
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Qepysc - cyclone size selector
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Qepysca - aerosol spectrometer
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Qepysd - settling-chamber size selector
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Qepyse - elutriator
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Qepyso - cascade size selector
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Qepyss - sieve analysis equipment
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Qer - dust analysis
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Qes - sample processing
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Qese - benzene extraction
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Qeso - sample preservation
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Qi - determination of concentration
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Qk - mineralogy
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Qm - materials testing
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Qo - biological and medical tests
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Qr - applied research
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Qu - investigation in human sciences
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Qw - work study
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Qy - mathematical analysis
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Qz - units of measurement
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R - medical prevention and treatment
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S - safety and health engineering
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T - personal protective equipment
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V - safety and health organization
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W - groups of persons
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X - industries
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Y - occupational accidents
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Z - generalities
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1 - Africa
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2 - America
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3 - Asia
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4 - Europe
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5 - Oceania
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6 - geographical areas
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7 - international governmental organizations (non UN)
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8 - UN organizations
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9 - international non-governmental organizations
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