Purpose : To test check valves for tightness in the direction of flow.

目的: 检测止回阀在流向上的紧固性.

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Purpose : To test check valve No.2 for tightness against flow.

目的: 检测止回阀2号对于回流是否紧密密封.

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Purpose : To test check valve No. 2 for tightness against reverse flow.

目的: 检测止回阀2号对于回流的紧密度.

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Purpose : To test check valve No.2 for tightness againstflow.

目的: 检测止回阀2号对于回流的紧固性.

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Purpose : To test check valve No.1 for tightness.

目的: 检测止回阀1号的密封性.

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To test check price, additions and distribution ( on the cashier's record ) of guest checks.

根据收银员打印的报告检查帐单价格 、 加单和分单的情况.

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Test - check the quality advantage.

试取质的优势.

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