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retaining valve
auto. 单向止回阀
el. 逆止阀
mech. 单向【止回】阀
met. 止回阀; 防逆阀
min.prod. 单向〔止回〕阀; 止逆〔回〕阀
railw. 保持阀; 制动缸压力保持阀
tech. 止逆阀
wind. 单向阀
retaining valve: 8 phrases in 3 subjects
Compressors2
Rail transport2
Technology4

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