There was no statistical difference in the olfactory threshold among W-workers, pathologists and controls(P>0.05).
三组人员的嗅觉阈差异无统计学意义（P >0 .0 5 ）。
The testing of olfactory threshold can be standardized scientifically and quantitatively by using standard olfactory liquids.
嗅觉标准液是可使人的嗅觉阈值测试标准化，科学化，数量化。
The testing of olfactory threshold can be standardized scientifically and quantitatively by using standard olfactory liquids.
嗅觉标准液是可使人的嗅觉阈值测试标准化，科学化，数量化。
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