The second step is to establish a series of pollen collecting stations on four transects running different directions from the source tree . 第二步是从离开夹源树四个不同方向的断面上建立一系列的花粉收集站。
Construction and timbering of big section winch room 大断面绞车硐室的施工与支护
Constructions of cryptogroups with inverse transversals 具有逆断面的密群的构造
Section analyze and measure method for aircraft tyres 航空轮胎断面分析测量方法
Section diagnose and measure method for aircraft tyre 航空轮胎断面分析测量方法
Support technology of soft rock roadway with large section 大断面软岩巷道支护技术
