11662| 14
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管子直徑不一,,切割角度怎么計(jì)算,、劃線比較簡(jiǎn)單 ,、方便,? |
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點(diǎn)評(píng)
鈑金展開計(jì)算書籍里有計(jì)算公式。
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點(diǎn)評(píng)
45度角尺按照投影原理劃線,,輕松搞定,。
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