must a white gypseous statue need to be drawn darkly?
原本是白色的石膏像,一定要画得黑球球?
must a white gypseous statue need to be drawn darkly?
原本是白色的石膏像,一定要画得黑球球?
The specific properties of gypsum and its slurry, the effect of different refractories on the properties of plaster molding, and how to control main process of gypseous mold are analyzed.
在大量试验研究的基础上,阐述了有关石膏型的几个要技术,析了石膏及其浆料的特性,各种填加物对石膏型性能的影响,以及如何控制石膏型造的要过程
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