double levelling meaning in English

双程水准测量

There are lowering and backing of the ground when it was planated . planation can be classified into many types such as peneplaination , pedimentation , cryoplanation and double leveling surfaces planation
夷平作用大致可分为准平原化夷平作用、山足夷平作用、冻融夷平作用和双层水平面夷平作用等几种类型。
Applying algorithms of double levels of frequency and weight , the accurate parameter of syndrome differentiation could be gotten , with algorithms of the additional weight and floating threshold , the accurate syndrome differentiation would come true
采用双层频权剪叉算法，可获得准确的辨证系数；用加权求和浮动阈值运算进行判断，能实现准确的辨证。
According to geologic basement , it can be divided into stable - floor planation surface and active - floor planation surface . according to climate zone , it can be divided into pediment and pediplain , double leveling surfaces and etchplain , peneplain and cryoplain
夷平面理论研究与初步模拟? ?中文摘要影响夷平面形成的主要因素有前期大地构造、侵蚀基准面、气候、岩性、时间和后期构造运动等。