Low noise coax cables should be used between the test coupons and the Model 7158 CARDS to avoid noise currents.
在测试样板和7158型开关卡之间应该使用低噪声同轴电缆，以避免噪声电流。
When there is no existing qualified WPS for a particular welding, the Production Dept. shall prepare test coupons for WPS qualification.
如果特定焊接操作，无经检定的焊接程序规范做指导，则生产部应准备附体试片，进行焊接程序规范检定。
Upon satisfactorily completion of the required visual inspection and PWHT, the coupons shall be sent for machining for preparation of test specimens.
目视检验合格，完成后焊热处理之后，附体试片应转送加工，作为试件样品使用。
Upon satisfactorily completion of the required visual inspection and PWHT, the coupons shall be sent for machining for preparation of test specimens.
目视检验合格，完成后焊热处理之后，附体试片应转送加工，作为试件样品使用。
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