... 长深比 length-depth ratio 杠杆[式]安全阀 lever safety valve 海军中尉 lieutenant junior grade ...
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短语
杠杆式安全阀
deadweight safety valve
;
[机]
lever safety valve
;
lever and weight loaded safety valve
;
weighted lever safety valve
杠杆重锤式安全阀
lever and weight safety valve