test coupon造句怎麼寫
- 造句
- 關注:2.28W次
The Welder shall be allocated a unique identification number which will be marked onto the test coupon. The identification will be maintained during all testing activities.
Renewal of qualification may be made for any process by welding a single test coupon of either plate or pipe, and by testing of that coupon as required by QW-301 and QW-302.
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