... water seal gate valves ==> 水封闸阀 water seal tank ==> 水封槽 water sealed explosion door ==> 水封防爆门 ...
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... seal pit 封闭纹孔 seal tank 水封槽 seal 封贴；密封 ...
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短语
水封槽地坑
pit for water seal pot
刮水器密封槽
wiper seal groove
u槽封水方案
sealing scheme with u trough