西部地区河砂匮乏，应用特细山砂和机制砂配制中低强度等级的自密实混凝土是西部地区迫切需要开发的混凝土工程技术。
The sand is lack in the western China, so preparing self-compacting concrete with low and middle strength with Super Fine Mountain Sand and Artifical Sand is necessary.
用一个细筛子将山莓压碎过滤，以制成山莓泥。
针对大吉山钨矿的原次生细泥处理流程进行了改造，应用新技术新产品，提升选矿生产水平。
The process technology of the primary and secondary fine slime in Dajishan tungsten mine was transformed to improve the process technique.
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