As shown in these diagrams, Crane Y-Pattern stopcheck valves used in a boiler installation can be positioned for horizontal or upward flow.是什么意思_As shown in these diagrams, Crane Y-Pattern stopcheck valves used in a boiler installation can be positioned for horizontal or upward flow.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句