There is some trouble in the borehole. Don't leave the rig floor.井下出现复杂情况, 不要离开钻台.Borehole hydromining is a kind of safe and efficient new mining method.钻孔水力采煤是一种既安全、又能极大地提高资源利用率的新的采矿方法.But the research on borehole ...
[ Ray ] I definitely started equating crossword puzzles with songwriting.我已经干脆开始把字谜游戏等同于歌曲写作了.But they have a hard time equating plural marriage with those evils.但是他们很难把这种多妻婚姻与上面说的那些坏事联系起来.Seriously? You're equating...
The authors show that the hyperboloid of one sheet and the hyperbolic paraboloid are ruled surfaces.作者证实:单叶双曲面和双曲抛物面是直线曲面.Two fdmilies Of characteristic lines in the hyperbolic region are not orthogonal.在双曲型区域两族特征线互不正交.F...