To replace the relief valve disc, hold the upper guide fin and unscrew the diaphragmpressure plate.
要更换安全阀阀瓣，握住上部引导翼，旋下隔膜压力板上的螺丝。
2
The next thing I knew he was placing his fists below my diaphragm and applying sudden, sharp pressure just below my rib cage to force the air out of my lungs in the Heimlich maneuver.
接着他的拳头在从我隔膜下方突然地打过来，突然的压力迫使我的胸腔压迫肺里的空气——是海姆利希手法。
3
Diaphragm spring pressure plate assemblies are widely used in most modern cars.