制作链锯确实无需高深科技，只是用传统的螺丝螺母将塑料手柄和金属链条加以组合。
There is no particularly special technology needed to make a chainsaw. It's really just plastic and metal parts screwed together with old-fashioned nuts and bolts.
如选择手动启动方式：按手柄控制器上的上下键来提起砝码组合上升到测试高度，然后按释放键，进入测试状态。
Manual mode: press the up or down of handle controller to lift up weight group to the test height, then press release key to enter test status.
它是在传统手术拉钩的基础上改进而成，由钩头（1）、钩颈（2）、手柄（3）依次连接组合而成。
The draw hook is improved on the basis of traditional surgical operational draw hooks, composed of a hook head (1), a hook neck (2) and a handle (3) which are connected with each other in turn.
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