西洋梨栽培的品种选择
How to select varieties to culture European pears
GIS服务动态选择选择机制
dynamic GIS service finding mechanism
产品细料率
the pulverization rate of products
细骨料携带氯离子
Chloride Ion Permeating in Sands
细集料品种
variety of fine aggregate
再生细骨料
recycled fine aggregate
recycled fine aggregate concrete
材料选择设计思路及流程
design idea and technolgocal process of material selection
材料选择原则
material selecting principle
锤头材料选择
selection of hammer head material