gate change-over valve
gate change-over valve
[铁道科技英汉词典]
gate change-over valve闸板转换阀
是什么意思，gate change-over valve的解释，gate change-over valve的翻译
gate change-over valve
[铁道科技英汉词典]
gate change-over valve是什么意思，gate change-over valve的解释，gate change-over valve的翻译