求翻译：抛丸室体为20mm厚优质钢板焊接结构，室内耐磨护板采用ZGMn13厚度16mm高锰耐磨钢（硬度达到HRC58）积木式（田字型）组装结构，护板与室体之间由锰钢扁铁做田字形填铁，耐磨护板由耐磨螺栓紧固在田字型填铁上。其安装、更换十分方便，改变了以往铸造护板一块搭一块的的安装形式，在检修和更换护板时非常方便，不需大面积拆除，只需将损坏的单块进行更换即可。耐磨护板使用寿命大于5000小时。是什么意思？

Shot blasting chamber body 20mm thick high-quality steel plate welded structure, indoor wear guard zgmn13 thickness 16mm high manganese wear-resistant steel (hardness hrc58) building block (Tian-shaped) assembly structure between the shield and the chamber body by manganese steel flat iron to do fie

Blasting room to 20 mm thick high quality steel welded construction, indoor wear guard for a ZGMn 13 thickness 16mm high-manganese wear steel (Rockwell hardness HRC reached 58 blocks (TIN), field-type) structure, the board and room by manganese steel between Chen Shui-bian made tin-filled iron, wear

Shot blast rooms of 20mm thick high quality steel plate welded structure, indoor wear-resistant shield thickness 16mm ZGMn13 high manganese wear-resistant steel (hardness up to HRC58) building blocks (font) Assembly structure, shielding and flat iron by manganese steel Tin glyphs between room with i