examination of weld preparation中文什么意思
发音:
（焊接）坡口检查
- examination: n. 1.考试 (in). 2.(问 ...
- weld: n. 【植物；植物学】淡黄木樨草；( ...
- preparation: n. 1.准备，预备；〔常 pl.〕 ...
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