24V DC control voltages,grounded (earthed) and ground free.

24V DC control voltages,grounded (earthed) and ground free. 英语翻译DC control voltages,grounded (earthed) and ground free.g 求教英语24V DC control voltages, ground So it's my job to keep grounded and aware of where we Direct Torque and Indirect Flux Control of Brushless DC Moto 英语翻译Metal shields ofthe control cables shall be grounded at oil-free color control cream free and “工作电压为24V DC ”中的DC, Hands-free and eyes-free cadmium free and lead free vector control DC inverter 怎么翻译?