我队用废钢砂钻头制成的取粉管接头，经长期使用证明，轻便耐用。现将改制方法介绍如下：1．先将废钢砂钻头用车床将丝扣和水口切去，所余长度应不小于140毫米，并加工其内径（如图1）。2．把锻成后并经过车削的圆柱芯子锒入筒内，两端进 Our team took scrap grit drill bit made of powder pipe joints, after long-term use proved lightweight and durable. Now restructuring methods are as follows: 1. Scrap bits and latches shall be cut by turning lathe first. The remaining length should be not less than 140 mm and the inner diameter should be machined (see Figure 1). 2. The forged and after turning the cylindrical core 锒 into the cylinder, both ends into