在裸露的金属上涂一薄层密封胶。
A.Spread a thin layer of sealing compound with a brush on the surface of the bare metal. B.Spray a thin layer of sealing compound on the metal sheet C.Apply a thin layer of sealant on the bare metal.正确答案C
在裸露的金属上涂一薄层密封胶。
A.Spread a thin layer of sealing compound with a brush on the surface of the bare metal. B.Spray a thin layer of sealing compound on the metal sheet C.Apply a thin layer of sealant on the bare metal.正确答案C
