所有救生艇吊柱的滑轮和滚轮拆开检查、清洁、加油并装妥。
All sheaves and rollers of the life boat davit need to be overhauled, cleaned, greased and reassembled.
向第一色谱柱(10)添加油性液体至获得多氯联苯类抽提液所需要的时间通常为2 ~ 10小时左右的短时间。
The time required for obtaining the polychlorinated-biphenyl extract after addition of the oily liquid to the first column (10) is generally as short as about 2-10 hours.
向第一色谱柱(10)添加油性液体至获得多氯联苯类抽提液所需要的时间通常为2 ~ 10小时左右的短时间。
The time required for obtaining the polychlorinated-biphenyl extract after addition of the oily liquid to the first column (10) is generally as short as about 2-10 hours.
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