PC - STEL is with the PC-TWA necessary one kind of short time contact limiting value, must conform to the contact limiting value which the formulation contact limiting value or calculates.
STEL是与PC- TWA相配套的一种短时间接触限值，必须符合制定的接触限值或推算出的接触限值。
PC - STEL is with the PC-TWA necessary one kind of short time contact limiting value, must conform to the contact limiting value which the formulation contact limiting value or calculates.
STEL是与PC- TWA相配套的一种短时间接触限值，必须符合制定的接触限值或推算出的接触限值。
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