pin seal 销钉连接
two-pin sure-seal connector 双销全密封连接器
four-pin sure-seal connector 四脚全密封连接器
three-pin sure-seal connector 三销全密封接头
seal driving pin 动环传动销
To make crushed ice, put some ice cubes into a strong polythene bag, seal it tightly, then hit it with a rolling pin to break up the ice.
制碎冰时，放一些冰块在结实的聚乙烯袋，封紧袋口，用擀杖敲击打碎即可。
Provide pin to avoid sealing at midway and protect seal part of packer, enhanced reliability of plugging string.
设计有防中途坐封的销钉，保护封隔器的密封件，提高了封堵管柱的可靠性。
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