åæåå¦å®éªå空ç½å®éªä¸ºäºåå°
ç³»ç»è¯¯å·®ã
以æµå®èªæ¥æ°´ç硬度为ä¾ï¼ç¨EDTAæ»´å®ï¼æ¤æ¶ï¼ä¸ä»
èªæ¥æ°´ä¸ç硬度被滴å®ï¼ç±è¯å代å
¥ç硬度ä¹ä¼è¢«æ»´å®ï¼å¯¼è´ç»æå大ï¼æ以è¦ç¨
å»ç¦»å水为空ç½ï¼å空ç½å®éªï¼ç®çæ¯ä¸ºäºåå°ç³»ç»è¯¯å·®ã