Key strata is a rock seam which plays an important controlling roles in the movement of mining overlayer strata while the key strata is sometimes made up of two or more compound rock strata.
在采场覆岩运动中起主要控制作用的岩层为关键层,而有时关键层是由2层或2层以上岩层形成的复合岩层所组成,我们称其为复合关键层。
It is mainly to research the compound karst developmental mechanism between the two soluble rocks,which are involved in the chemical karstification and the biological karst processes.
文章主要从自然条件上研究两者复合岩溶发育的机理,探讨了化学岩溶作用过程和生物岩溶作用的机理。
In this area the sheets could have originated from a separate center of eruption.
这地区的岩席可能发源于另一喷发中心。
The striking connection of Cenozoic thrust sheets in Kalpin fault uplift,Xinjiang,and their formation mechanism
新疆柯坪新生代推覆岩席的走向连接与成因分析
The Parefin 4 chromite claims near the northern end of the Csardas thrust again indicate the eastward extension of the thinning ultrabasic sheet from Railway Block.
靠近萨达斯冲断层北端的帕勒芬4铬矿区又表明从铁路段向东超基性岩席减薄的情况。
The thickness of this sheet sandstone is related directly to rate of regression and the amount of sand available.
这种席状砂岩的厚度直接取决于海退速率以及砂质供给量。
Sheeted dike swarm in Hongliugou,northwest of the Altun region:Evi dence for seafloor spreading
阿尔金山米兰红柳沟的席状岩墙群:海底扩张的重要证据
Microbial mat-related silty dykes of the Precambrian:An example from the Paleoproterozoic Chuanlinggou Formation at Jixian section in Tianjin
前寒武纪与微生物席相关的粉砂岩岩墙——以天津蓟县古元古界串岭沟组为例
Rock Mechanical Delegation of Our Institute Visited the Demecratic People’s Republic of Korea
我所岩石力学代表团访问朝鲜 朝鲜人民的伟大领袖金日成主席亲切接见代表团全体成员
"Baiyangdian mats are best," is quite an axiom.
“好席子，白洋淀席
The persons or number of persons that are present.
出席者或出席人数。
The galleries were packed.
旁听席上座无虚席。
Covered with or made from mats.
铺席的或用席子做成的
B: Smoking or non-smoking?
乙：吸烟席还是非吸烟席?
a mat made of thin BamBoo strips dissipates heat more quickly than a straw one.
篾席比草席散热迅速。
Wise men take advantage of the opportunities which fools give them.
傻瓜摆酒席，智者吃酒席。
To be present, as at a conference.
出席在场，如出席会议
Of or relating to one that is absent.
缺席者的缺席者的与和缺席者有关的
lithic arkosic wacke
岩屑长石砂岩质杂砂岩
Of or containing porphyry.
斑岩的斑岩的，含斑岩的