Carbon is used since it is inexpensive and will not melt like a metalconductor.
我们之所以使用碳转,其一:价格低廉;其二:不会像金属导体熔化。
2
The object is maintained anodic, with the cathodic connection being made to a nearby metalconductor.
该物体为阳极,阴极连接到附近的金属导体上。
3
Since the inner diameter of the Teflon and PE tubes is much larger than the outer diameter of the metalconductor, the metal only touches the tubes in a single line.