材质选择与控制
Material Selection and Control
管道材质选择
selection on pipe material
管线材质选择
pipeline material selection
GIS服务动态选择选择机制
dynamic GIS service finding mechanism
建材选择
choice of building materials
教材选择
Selection of subject matter
插条与基质选择
screening of cuttage and culture type
地质选择过程
geological selective process
工质选择
Selection of working fluid
working medium choice