BW为对çswæ¿æPE å¹³é¢ç«¯
BE å¡å£ç«¯
BW 对ç (BUTT WELDING)
SW å¥ç (SOCKET WELDING)
NPT
管èºçº¹æ åï¼ç¾æ ï¼NATIONAL PIPE THREAD)
RF çªèµ·é¨å ï¼RAISED FACEï¼
BW X NPT ä¸å¤´å¯¹çï¼ä¸å¤´NPTèºçº¹
BW X SW ä¸å¤´å¯¹çï¼ä¸å¤´å¥çã