Saw Wheel are uphold by double arm. single arm can flex and to adjust the deflection of saw blade.

锯轮采用双臂支撑，单臂可微动伸缩，方便调整锯条偏摆。

youdao

The first double arm transplant was performed in Germany July 25, in which a 54-year-old man was given the arms of a 19-year-old boy who died in a car crash.

一名54岁男子25日在德国接受世界首例双臂移植手术，被移植手臂原属一位死于交通事故的19岁少年。

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Adopts hydraulic double arm, turn pot discharging, free disassembly agitator, save manpower, reduces the labor intensity, is good performance of food processing equipment.

采用液压翻臂，翻锅出料，免拆装搅拌器，节省人力，降低劳动强度，是性能优良的食品加工设备。

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The operation could help double arm amputees move their manufactured arms with greater ease and control.

VOA: special.2009.03.10

Last month, the 26-year-old infantryman had successful surgery -- a rare double arm transplant -- at Johns Hopkins Hospital in Baltimore.

CNN: Iraq vet undergoes successful double-arm transplant

In 2005 Motsepe made an ambitious pledge: double ARM's size by 2010.

FORBES: Magazine Article

The first US soldier to survive losing four limbs in Iraq has said he is looking forward to swimming and driving after having a double arm transplant.

BBC: Brendan Marrocco, US quadruple amputee, gets new arms