New type electric control big gate valve is introduced, which uses JZ - 7 locomotive brake and it is controlled by microprocessor and stepping motor.是什么意思_New type electric control big gate valve is introduced, which uses JZ - 7 locomotive brake and it is controlled by microprocessor and stepping motor.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句