The calcium plaster with sound fluidity and low air content can be obtained rapidly.
本类机适用于各类石膏的搅拌及降低石膏内空气含量。
The yellow substance was gypsum, or calcium sulfate dehydrate, a common component of plaster.
这种黄色的物质叫做脱水硫化钙，通常是石膏的一种组成部分。
The yellow substance was gypsum, or calcium sulfate dehydrate, a common component of plaster.
这种黄色的物质叫做脱水硫化钙，通常是石膏的一种组成部分。
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