n.吊艇柱，吊艇架，吊柱
Inspection the structure and loading test of the lifeboat ( Rescue boat ) davit.
救生 ( 助 ) 艇吊架结构和压重试验.
Suez Canal searchlight, but socket and davit to be supplied by builder.
苏伊士运河探照灯, 但插座和吊柱由建造方提供.
The strength test for davit.
艇架强度试验.
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