upper support meaning in English

上支承
上支架

Characteristics of structure : this machine adopts shaft type speed reducer drive which covers less space and can be conveniently repaired . upper supporting roller adopts clamping type fixu which can be conveniently installed . furthermore , it can well regulate deflection of conveying belt ; holdback is set for speed reducer with reliable performance to prevent back - slippign of the glusive belt ; dumper has three types : pneumatically actuated , electric and manual ; course of direction - change roller of the rail has three types : 300 , 500 and 800
2结构特点：该机采用轴装式减速器驱动，占用空间尺寸小，安装维修方便上托辊采用夹紧式固定，安装方便调整输送带跑偏能力强，减速器内设逆止器，防止胶带倒滑的性能可靠卸料器有气动电动和手动三种驱动型式尾部改向滚筒张紧行程有300 500 800三种，用户可接输送距离的1100选取。