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单向阀由单向阀套、阀芯、阀座和弹簧构成。
The unidirectional valve comprises a unidirectional valve sleeve, a valve core, a valve seat and a spring.
youdao
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单向阀由单向阀套、阀芯、阀座和弹簧构成。
The unidirectional valve comprises a unidirectional valve sleeve, a valve core, a valve seat and a spring.
youdao