选择时应分离石料标号和砂浆标号综合思索。
Choice hour should combine a stone to anticipate mark number and sand syrup mark number comprehensive consideration.
面层抹得很厚，用上高标号水泥，高强度砂浆，这就错了。
Wipe the surface very thick, use high-grade cement mortar, high strength, this is wrong.
面层抹得很厚，用上高标号水泥，高强度砂浆，这就错了。
Wipe the surface very thick, use high-grade cement mortar, high strength, this is wrong.
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