例句與造句

1. Sometimes the fittings are considered sufficiently conductive to " bond " ( electrically unite ) the metal conduit to a metal junction box ( thus sharing the box's ground connection ); other times, "'grounding bushings "'are used which have bonding jumpers from the bushing to a grounding screw on the box.
2. It's difficult to find grounding bushing in a sentence. 用grounding bushing造句挺難的