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huangguaha木虫之王 (文坛精英)
我不是我
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[求助]
英译汉，谢谢~~
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The method resides in preparing a blank (1) comprising two tubular components (2, 3) housed one inside the other and of different compositions and separated by an annular space (4) which is filled with divided metal. The whole assembly is made rigid by two end pieces (7, 8) and coextrusion is carried out at a suitable temperature to ensure a metallurgical bond between the inner component (2) and the outer component (3). 专利上的，谢谢~~ |
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