Geomorphology deals with the origin of landscapes and changes in them.地貌学研究地形的成因及其变化.The petroleum exploration geologist working with subsurface channel sandstone must have a background knowledge of geomorphology.和地下的水道砂...
由金相显微结构的观察,焊合状态可区分为无焊合缝、散洞状 、 细线状及粗条状等四种.The bonding status could be categorized into well bonded scattered holes, thin line and strip.分析了弯曲强度、断裂挠度与焊合率之间的关系及接头的金相组织.The micro structures and the relations between bonding ...