红色/绿色两位常开闭普通按钮。这句话如何翻译
在加拿大 电气方面的英语，这句话意思是说 红色和绿色中一组为常开，一组为常闭 按钮？ 评论 Red/Green Switch, one Alwas On, one Always Off 评论 could you explain the orginal sentence rather than the explaination....华人论坛
在加拿大 电气方面的英语，这句话意思是说 红色和绿色中一组为常开，一组为常闭 按钮？ 评论 Red/Green Switch, one Alwas On, one Always Off 评论 could you explain the orginal sentence rather than the explaination....华人论坛