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The first-new discharge valve, good vacuum degree, the product is macroscopy and free of blowholes;
全新出料阀门，真空度好，制品宏观无气泡；
youdao
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The first-new discharge valve, good vacuum degree, the product is macroscopy and free of blowholes;
全新出料阀门，真空度好，制品宏观无气泡；
youdao