利用滑块带动金属杆切割亥姆霍兹线圈中心区域匀强磁场的磁感应线，可以产生感应电动势。
Using the slider to drive a metal bar to cut perpendicularly the uniform magnetic field in the center of a Helmholtz coil, induction electromotive force could be produced.
本发明的高分子含油轴承材料，还可取代铜及其他有色金属，用于制作滑块、涡轮、辊筒、托辊和止推垫片等。
Said invention can be used for making slide block, turbine, drum, carrier roller and anti-thrust pad, etc. instead of copper and other non-ferrous metal.
滑块上还进一步设置了金属扣片，金属扣片上的勾部可以与对接连接 器的凹槽相扣合以固定对接连接器。
The sliding block is further provided with a metal buckling sheet of which the hook part can be buckled with a groove on the butting connector in order to fix the butting connector.
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