injection grease gun

例句：

1. 1. The engineer used an injection grease gun to lubricate the gears.
   工程师使用注射器式润滑枪给齿轮润滑。
2. 2. The technician was instructed to use an injection grease gun to clean the bearings.
   技术员被指示使用注射器式润滑枪清洁轴承。
3. 3. The mechanic replaced the oil filter with an injection grease gun.
   机械师用注射器式润滑枪更换了油滤器。