And from three aspects as masonry mortar, plaster mortar and the roof leveling blanket the actions are discussed.

从砌筑砂浆、抹灰砂浆、屋面找平层三方面进行了论述；

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And from three aspects as masonry mortar, plaster mortar and the roof leveling blanket the actions are discussed.

从砌筑砂浆、抹灰砂浆、屋面找平层三方面进行了论述；

youdao