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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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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。
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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。
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