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In veiw of many difficulties in unfolding taper tubes in the course of manufacturing tanks of gas unloading bulk cement delivery tanker,the author presents the method of drawing taper tubes unfolded drawings through selecting points and calculating by analysis method.

针对气卸散装水泥车V形罐体制作中锥筒放样难度较大的情况,提出了通过解析法选点计算画出锥筒展开图的方法。