弓架平板铸件（2）由弓架上臂（21）、弓架下臂（22）和弓架侧平板（28）铸 造成一体件。
The bow-shaped frame slab cast (2) is formed by integrally casting a bow-shaped frame upper arm (21), a bow-shaped frame lower arm (22) and a bow-shaped frame lateral slab (28).
弓架平板铸件（2）由弓架上臂（21）、弓架下臂（22）和弓架侧平板（28）铸 造成一体件。
The bow-shaped frame slab cast (2) is formed by integrally casting a bow-shaped frame upper arm (21), a bow-shaped frame lower arm (22) and a bow-shaped frame lateral slab (28).
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