常見例句雙語例句To replace the relief valve disc, hold the upper guide fin and unscrew the diaphragm pressure plate.要更換安全閥閥瓣，握住上部引導(dǎo)翼，旋下隔膜壓力板上的螺絲。The utility model is mainly composed of electromagnet, a valve core, a valve disc, a chassis, a connecting pipe and a guide frame.它主要由電磁鐵、閥芯、閥盤、底盤、連接管和導(dǎo)架組成。ip.com 返回 valve guide disc guide