roof n. 1.屋顶,房屋;家屋。 2.(放行李的)车顶;笠形罩。 3.上颌。 4.最高部,顶部;【矿物】顶板。 5.【航空】(飞机)机身上的包皮;担任空中掩护的飞机;〔口语〕(飞机的)绝对上升限度。 the roof of heaven 天空。 the roof of the world 世界的屋脊。 full to the roof 塞满一屋。 hit the roof [ceiling]勃然大怒[狂怒]。 left [be] without a roof 无家可归。 raise the roof 〔俚语〕喧闹;闹翻了天;大声诉苦[发怨言]。 under sb.'s roof 寄住某人家里。 under a roof of foliage 在树荫下。 under the roof of 住在…的家里,寄…的篱下,在…的照应下。 vt. 给…盖屋顶;像屋顶一样盖着;放入屋里;保护,庇护。 adj. -less 无屋顶的;无家的,无住处的。
Roof bolt plates for mining and tunnel support 矿井和遂道支撑用防护锚栓板
Research and development of new drilling bit for roof bolt driller 锚杆钻机新型钻头的研制
Galvanized mild steel roofing bolt and nut 镀锌瓦楞螺栓螺帽
Technique of combined supporting of roof bolting with bar and wire mesh in coal roadway 煤巷锚梁网组合支护技术的研究与应用
Expansion type roof bolt 膨胀式锚杆
Application of the technology of roof bolting with bar and wire mesh in the zhangji coal mine 三维地震勘探在王庄煤矿62采区的应用
Based on the rock pressure ' s characteristics of the pre - driven roadway , the rational support plan and parameters about roof bolting with bar and wire mesh are determined , and the manner of driven waste in place of coal was adopted 基于断层中预掘巷的矿压特点,确定出其合理的锚梁网支护方案与支护参数,并采用了掘出的矸石与煤的合理“置换”方式。