Endogenic rocks are not clastic.内生岩石不是碎屑状的.The crack in the coal seam is divided into two kinds: endogenic crack and exogenous crack.煤层中的裂隙分两种,即外生裂隙和内生裂隙.Starting from the present research situation, endogenic and exogen...
The Barton family have lived in this village since time immemorial.巴顿家族自古以来就住在这个村里.From time immemorial there has been the belief that there are good and bad places to be.人生既有顺境，也有逆境，这种观念自古有之。Communicable diseases have b...
The luminaire shade adopts Pyrex glass with high light transmission.玻璃罩材料为耐热玻璃,透光性能好,光通量损失小.This luminaire consists of outer cleaning part and inner explosion - proof part.本灯具由外部净化,内部 防爆 两部分组合而成.This Luminaire consists o...