磨损的

wear resistant cast iron

耐磨铸铁

wear resistant 耐磨的 | wear resistant cast iron 耐磨铸铁 | wear test 磨损试验

throw-over gear

转换机构

throw-off post 甩柱 | throw-over gear 转换机构 | throwaway bit 磨损报废的钻头

Let that rig tow it out

叫那部钻机把它拖出来

905. The water truck was stranded. 水罐车误住了. | 906. Let that rig tow it out. 叫那部钻机把它拖出来. | 907. That bit is worn out, change it, please. 那个钻头磨损太厉害了,需要换个新的.

haulage device：拖曳设备;运输设备

haul road 运料路;拖运材料的道路 | haulage device 拖曳设备;运输设备 | hazardous slope 危险斜坡

Let sb. in：让某人进

8.be late for school上学迟到 | 9.let sb in让某人进 | 11.travel around the world环游世界