“bed rock”造句，怎麼用bed rock造句

The order for the selection of testing methods is given: constant( or falling) head permeability test, pump| in test, Lugeon test and dissipation test( for the bed rock with low permeability).

The technology measures of bed rock aciding, preflush and gelling acid fracturing, as well as sand fracturing etc. are used.

Method for evaluating the performance of such bed rock bench marks is also proposed on the basis of in situ measurement at Jinxian and Xianggongzhuang Stations.

The main factors effecting of slipping area along the bed rock and roof separation and failure area and the major avenue of damage surrounding rock caused by mining are analyzed in this paper.

The distributions have a close relation with bed rock property, littoral zone types, geography, water systems, hydraulic conditions and bed property of sea bottom.