Pipe racking system was developed when people began to find methods to mechanize the operation of tripping in and tripping out in 1940s.是什么意思_Pipe racking system was developed when people began to find methods to mechanize the operation of tripping in and tripping out in 1940s.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句