應該是backflow preventer吧?是防止用戶端汙染的水源反向流到公共管網端,汙染其他用戶
所有跟帖:
• 是的,那為什麽有的做有的不做? -hz82000- ♀ (0 bytes) () 05/10/2024 postreply 14:19:52
• 是的,那為什麽有的做有的不做? -hz82000- ♀ (0 bytes) () 05/10/2024 postreply 14:19:52
WENXUECITY.COM does not represent or guarantee the truthfulness, accuracy, or reliability of any of communications posted by other users.
Copyright ©1998-2024 wenxuecity.com All rights reserved. Privacy Statement & Terms of Use & User Privacy Protection Policy