graphite slip ring

例句：

1. 1. The graphite slip ringis used in the manufacturing of electrical equipment.
   石墨滑环用于制造电气设备。
2. 2. Thegraphite slip ring was designed to improvethe efficiency of the machine.
   石墨滑环的设计旨在提高机器的效率。
3. 3. Thegraphite slip ring isa crucial component in the operationof the machine.
   石墨滑环是机器运行的关键部件。