青云翻译

4) primary clean-up: Before the construction of garbage on the insulation layer should be, floating ash clean up, make sure surface is clean.

4) basic cleanup: prior to the construction of litter, loose Ash on the insulating layer should be clean, ensure that the surface clean.

4) basic cleanup: prior to the construction of litter, loose Ash on the insulating layer should be clean, ensure that the surface clean.