What are some common terminologies used in English for ball screws?

滚珠丝杠是由金属材料制成的，而当前3D打印技术主要使用塑料材料进行打印，因此目前还不能直接用3D打印技术打印滚珠丝杠。但是，可以使用3D打印技术打印滚珠丝杠的模型，然后利用CNC加工或其他方法制造出实际的滚珠丝杠。

How is the grammar and vocabulary taught in this English lesson on ball screws?

Introduction to Ball Screw A ball screw is a type of mechanical linear actuator that converts rotary motion into linear motion with minimal friction. It consists of a threaded shaft and a nut that contains a set of ball bearings that roll in the grooves of the shaft and nut. The rolling motion of the balls reduces the friction and allows for smooth and precise movement. Advantages of Ball Screw Ball screws have several advantages over other types of linear motion systems. They have high precision and repeatability, which makes them ideal for applications that require accurate positioning and motion control. They also have high efficiency and can convert a large amount of rotary motion into linear motion with minimal energy loss. Applications of Ball Screw Ball screws are used in a wide range of applications, including CNC machines, robotics, aircraft and aerospace equipment, medical equipment, and semiconductor manufacturing equipment. They are also used in automotive steering systems, machine tools, and injection molding machines. Conclusion Ball screws are an essential component in many modern industrial systems. Their high precision, efficiency, and durability make them an ideal choice for applications that require accurate and reliable linear motion.