The features of bill of materials (BOM) were introduced and basalstructure of BOM was described.
简介了物料清单(BOM)的特点，给出了BOM的基本结构图。
2
There are two groups of faulted structure, faulted structure in northwest is product of inheritance and reform from basalstructure.
断裂构造主要有两组，北西向断裂为基底构造继承和改造的产物。
3
The distribution feature of the flood land along the river, its landform and structure, basal structures and hydrologic conditions are analyzed based on the data collected systematically.