我厂主要生产管子铅和农用挂车，部分零部件由可缎铸铁制造。可锻铸铁件的成本占全厂材料总成本的25％，所以降低可锻铸铁件的成本，从丽降低产品成本，便成了我们追求的目标。一、向标准要效益管子钳执行产品标准GB8406-87（管子钳），该标准中规定管子铅的全长尺寸如表1。过? Our factory mainly produces tube lead and agricultural trailer, some parts made of satin cast iron. The cost of malleable cast iron accounts for 25% of the total cost of the whole factory, so reducing the cost of malleable cast iron and reducing the product cost from Li, has become our goal. First, the standard to be effective Pipe clamp implementation of product standards GB8406-87 (pipe clamp), the standard provisions of the full length of the lead pipe size shown in Table 1. Over?