利用φ33.5的廢鑽桿改製成200/40型,200/30型和100/30型往復水泵的拉桿可以節約原材料。其改製的具體作法: 1.所需材料與工具; ①校直後的切成適當長度(依各規格分泵的拉桿長度來決定)的鑽桿一根(圖中之(1)所示); The use of φ33.5 waste drill rods to convert 200/40, 200/30 and 100/30 reciprocating water pump rods can save raw materials. The specific method of restructuring: 1. The required materials and tools; 1 after the straight cut into the appropriate length (depending on the specifications of the pump rod length to determine the drill pipe) (shown in (1));