短語(yǔ)詞組短語(yǔ)STEL Short -Term Exposure Limit 短時(shí)間暴露界限permissible concentration -short term exposure 短時(shí)間接觸容許濃度Pemissible concentration -Short Term Exposure Limit 短時(shí)間接觸容許濃度 返回 short-term exposure