它包括支架，支架上固定安装冲击板。
The device comprises a frame and an impacted plate fixed on the frame.
优势：机架可以开启，使得更换锤头、反击板及衬板的工作更加简便易行。
Advantage: frame can open, make replacing hammer head, back plate and lining board work easier.
优势：机架可以开启，使得更换锤头、反击板及衬板的工作更加简便易行。
Advantage: frame can open, make replacing hammer head, back plate and lining board work easier.
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