Sheet metal workers fabricate, assemble, install and repairsheet metal products.
钣金工人制造，装配，安装和维修钣金产品。
2
Install, repair or replace single-ply roofing system using waterproof sheet materials such as modified plastics, elastomeric or other asphaltic compositions.
使用防水片材，如改性塑料，橡胶或其他沥青成分安装，维修或更换单层屋面系统。
3
The reasonable shape of the blank can improve the formability of the sheet metal, make full use of the material, decrease the work of finishing repair.