... manually-operated valve 手动阀; 人工操作阀 marine safety valve 船用安全阀 marine valve 船用阀门 ...
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... check-valve guidance 止回阀导座 marine guidance safety valve 船用安全阀 Flow guidance knife valve 导流平板阀 ...
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... interior differential needle valve 内差式针阀 low-speed needle valve 低速针阀 mariners needle valve 船用安全阀 ...
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