auxiliary arm
... auxiliary appliances for lighting system 照明附具 auxiliary arm 辅臂 auxiliary attachment 附件 ...
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辅臂螺旋波 hump spiral
辅助臂 sub-arm ; [机] auxiliary arm ; subarm
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前臂、后臂、辅臂以及插件与主杆之间为活动连接， 均可折叠于主杆上。
The front arm, the rear arm, the auxiliary arm and the plug-in are movably connected with the main rod and can be folded on the main rod.
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