play a bit role meaning in Chinese

跑龙套

Core guide groove plate and keys guide plate , they can be a very good guide insert the key - lock curve , they also can effectively prevent - line tools to open locks road allocated insert technology pellets , billiard and supporting anti - drilling unit has played backing billiard do not fall into the lock , they can effectively prevent the portable rechargeable electric drill - the penetrating , also can play a bit role jammed , they also can improve the defense lock drilling capacity and the ability to open devastating
锁芯导槽片和钥匙导向片，能很好地引导钥匙插入曲线式锁道，并能有效地防止直列式开启工具插入锁道拨技弹珠，而弹子支撑防钻片起到支撑下弹子不落入锁道，并能有效地防止便携充电式电钻的钻入，起到卡住钻头的作用，提高锁具的防钻能力和破坏性开启的能力。