翅膀是支撑钢翼双支柱，并固定在去除附着在机身和机翼的客舱与四架螺栓容易。
The wings are braced by dual steel wing struts, and are bolted to the fuselage at the cabin frame with four bolts for easy wing attachment and removal.
必须使用合适的设备来安全提升脚手架的配件、支柱和板材。
Proper provisions must be made for the safe lifting of scaffold fittings, poles and boards.
所有的脚手架支柱、 支架或上部构件都必须垂直并牢固拉撑，以防摆动和位移。
All poles, legs, or uprights of scaffolds shall be plumb and rigidly braced to prevent swaying and displacement.
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