The sights are of opentype, with hooded front post and open notch adjustable rear.
视力是有开着类型的，由于罩上前面的职位和开着的刻痕可调整后面。
2
A new process for the front treatment of open width about thin cloth of cotton is put forward, which use for desizing and scouring and bleaching by conveyer type scouring and bleaching machine.
介绍一种纯棉薄织物的平幅前处理新工艺，该工艺采用了常压履带式练漂机退浆和练漂。
3
Open and close valve is equipped for front-end memory type alloy detector and upper shifting fork.