Filling the cylinder with lead shot to simulate a sample's weight.
圆柱里面灌铅，以模拟样本的重量。
You must know how to stop the cylinder filling process in case of an emergency.
你必须知道在紧急情况下，如何停止气瓶的充装。
You must know how to stop the cylinder-filling process in case of an emergency.
你必须清楚在紧急的情况下如何停止气瓶的充装。
You must know how to stop the cylinder-filling process in case of an emergency.
你必须清楚在紧急的情况下如何停止气瓶的充装。
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