NIBCO bronze ball valves installed with NIB-SEAL? insulated handles are the only approach that keeps your insulated piping system completely intact.是什么意思_NIBCO bronze ball valves installed with NIB-SEAL? insulated handles are the only approach that keeps your insulated piping system completely intact.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句