3kg pcb 板只接触两根钢轨的推力的翻译：3kg PCB boards only contacted the two rails of thrust 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

3kg pcb board only contact with the thrust two rail

3kg PCB boards only contacted the two rails of thrust

3kg the pcb board only contacts two rails the thrust forces

3kg PCB board only contacted two kan friezes of thrust

3kg PCB boards only contacted the two rails of thrust