1.
Control on rock friction sparks and heating-up of sandstone roof in a coal mine
抑制煤矿砂岩顶板岩石摩擦火花和升温
2.
Mechanics characteristics of coal and its roof and floor rock and the effects of hydraulic fracturing on coal reservoir
煤岩与顶底板岩石力学性质及对煤储层压裂的影响
3.
Research on the Mechanism of Roof-floor Shearing Deformation and Breakage in No.1 Coal Mine of Shi Zuishan Deep Weak Rock Roadway;
石嘴山一矿深部软岩巷道顶底板剪切变形破坏机理研究
4.
thin layers of rock used for roofing.
用来盖屋顶的薄岩石层。
5.
sedimentary rocks,eg sandstone,limestone,slate
沉积岩（如砂岩、石灰岩、板岩）.
6.
A high rock or pile of rocks on the top of a hill.
突岩山顶上高耸的一块或一堆岩石
7.
outward-spreading lithospheric plate
向外扩张的岩石圈板块
8.
The cardium sandstone is lithic, being composed of grains of chert, quartz, quartzite, silicified argillite, and other rock fragments.
卡迪砂岩是岩屑砂岩，由燧石，石英、石英岩、硅化泥板岩和其它岩石碎屑颗粒所组成。
9.
Experience in combined supporting for use in large-span underground chamber under soft roof strata
软岩顶板下大断面硐室联合支护经验
10.
Detector of Coal Seam Roof Strata Based on S3C44B0X Framework
基于S3C44B0X构架下的煤层顶板岩层探测器
11.
The top of the rock tapers sharply.
那块岩石的顶端猛然变得异常尖细。
12.
You can see the entire lake from the top of the rock.
从岩石顶上你可以看到湖的全景。
13.
It was said that the bear had laired among the rocks at the top of the valley.
据说那只熊已住进山顶岩石的窝中。
14.
The selecting type of the support and roof control in soft rock coal seam floor
软岩底板煤层支架选型及顶板控制研究
15.
a pencil of soft slate (or soapstone) used for writing on a slate.
用来在石板上书写的软岩（或皂石）铅笔。
16.
flag stone of cement, concrete or artificial stone (excl. agglomerated salte)
石板,水泥、混凝土或人造石料制（不包括凝集板岩）
17.
The roof was slated instead of thatched.
那个屋顶不是用草而是用石板盖的。
18.
Put the slats on the roof so that they lap over.
把石板瓦安放在屋顶上，使之相互叠盖。