The average UK coal seam is one metre thick.英國煤層的平均厚度為1米。Tack them together with a 1.5 cm seam.用1.5厘米的針腳將它們暫時縫上。Use vinyl seam adhesive where vinyls overlap.塑料布相疊處用塑料封口膠粘起來。...
This seam of coal reposes on a layer of clay.這個煤層處于一層黏土巖之上.A new method for seam tracking using image centroid in gas tungsten arc welding is presented.研究一種基于圖像質心識別的電弧焊焊縫跟蹤新方法.The crack in the coal seam is divided into t...