The valve face is provided with a pilot hole or a micro fixing valve.
阀面上 冲有导向孔或微型固阀。
After the disintegration of the distribution valve, the main body was found face has scratches.
后解体分配阀，发现主阀体工作面已擦伤。
After the disintegration of the distribution valve, the main body was found face has scratches.
后解体分配阀，发现主阀体工作面已擦伤。
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