Oxygen concentrations in excess of 23% increase the hazard exposure to personnel and material.
氧浓度超过23%增加了暴露于其中的人员和材料的危险。
Before cutting the tubes to be bend, be sure to allow material in excess.
在剪下管是弯管之前，确定允许材料过量地。
Before cutting the tubes to be bend, be sure to allow material in excess.
在剪下管是弯管之前，确定允许材料过量地。
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