您要查找的是不是：
- mechanical roughening pump 机械初步抽空泵
- Mechanical graining Mechanically roughening the surface of a metal sheet by means of abrasive powders, sand bursting, etc, for use as an offset plate.SeeGraining. 机械磨版用磨擦粉剂,喷沙等机械方法把金属片的表面造成粗糙,适合为柯式印刷。参阅磨版。
- Mechanical graining: Mechanically roughening the surface of a metal sheet by means of abrasive powders, sand bursting, etc, for use as an offset plate. See Graining . 机械磨版:用磨擦粉剂，喷沙等机械方法把金属片的表面造成粗糙，适合为柯式印刷。参阅磨版。
- Mechanically roughening the surface of a metal sheet by means of abrasive powders, sand bursting, etc, for use as an offset plate. See Graining . 机械磨版:用磨擦粉剂，喷沙等机械方法把金属片的表面造成粗糙，适合为柯式印刷。参阅磨版。
- Mechanically roughening the surface of a metal sheet by means of abrasive powders, sand bursting, etc, for use as an offset plate . 用机械方法把书页结合一起的方法。通常是用金属线或胶圈。
- Roughen the surface before applying the paint. 先把表面弄毛糙再涂颜料。
- Is this equipment tested for mechanical aptitude? 这台设备测定了其机械适应性了吗？
- We need a mechanical digger to level the ground. 我们需要一台挖掘机来平整土地。
- Before painting the wood, roughen the surface with sandpaper. 油漆木器前，先用砂低把表面磨毛糙。
- A tyre expands when you pump air into it. 轮胎一打气就鼓起来。
- Lashing velocity of pump is concerned with nature of air. 泵的抽气速率与气体的性质有关。
- The move water have mechanical energy. 流动的水拥有机械能。
- This tire is flat; you didn't pump enough air in. 这个轮胎没气了;你并没打足气。
- We have a pump for drawing water from the well. 我们用一个水泵从井里抽水。
- The heart is analogous to a pump. 心脏和水泵有相似之处。
- Blinking is a mechanical action of the eyelids. 眨眼是眼睑的无意识动作。
- Can you lend me your bicycle pump? 能把你的打气筒借给我吗？
- Here is an old-fashioned pump for drawing water from a well. 这里有一个旧式水泵可从井里抽水。
- A mechanical model of the solar system. 太阳系仪太阳系的机械模型
- In a strict, step-by-step or mechanical way. 机械地以严格的，一步一步的或机械的方式
