因此一些发达国家外保温面层抹平，不允许用铁抹子拍打，只能用木抹子搓压平整。

So some developed countries with external thermal insulation layer flat, and allowed to use iron float shall be used to beat, can only use wood float shall be used to rub pressure level off.

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若采用石膏作面层，其光洁平整的表面可以省去表面的二次抹平工序。

If gypsum is adopted as the face layer because the surface is smooth and flat secondary surface-rolling procedure for surface can be omitted.

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