trailer braking protecton valve 挂车制动保护阀
trailer braking relay emergency valve 挂车制动应急继动阀
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Diagraph spring pneumatic brake valve is widely used as control valve for tractor - trailer braking system.
膜片弹簧式气制动阀作为控制阀已广泛地应用于拖拉机挂车制动系统。
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