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fine material
archit. 粒材料; 细料
bridg.constr. 细粒材料
desert. 细粒物质
met. 粉料; 细粒物料; 粉矿
pulp.n.paper 粉末物质
fine material: 16 phrases in 4 subjects
Bridge construction2
Desert science1
Metallurgy6
Technology7