外壳罩圈具有锁紧及加铅封的功能。
这个集装箱的铅封已经失落，我们不能接收，只得退关。
The seal of this container is lost, so we can't accept it. It had to be shut out.
该铅封应用于电力表箱、仪器仪表、石油化工等单位，采用高强度的尼龙或聚乙烯制成。
Table accessories for the electricity boxes, instrumentation, and the petrochemical units, using high-intensity nylon or polyethylene manufactured.
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