登录注册
主页关于 MindatMindat手册Mindat的历史版权Who We Are联系我们于 Mindat.org刊登广告
捐赠给 MindatCorporate Sponsorship赞助板页已赞助的板页在 Mindat刊登 广告的广告商于 Mindat.org刊登广告
Learning CenterWhat is a mineral?The most common minerals on earthInformation for EducatorsMindat ArticlesThe Elements书籍及杂志
搜索矿物的性质搜索矿物的化学Advanced Locality Search随意显示任何一 种矿物Random Locality使用minID搜索邻近产地Search Articles搜索词汇表更多搜索选项
搜索:
矿物名称:
地区产地名称:
关键字:
 
Mindat手册添加新照片Rate Photos产区编辑报告Coordinate Completion Report添加词汇表项目
Mining Companies统计会员列表Mineral Museums矿物展及活动The Mindat目录表设备设置
照片搜索Photo Galleries今天最新的照片昨天最新的照片用户照片相集过去每日精选照片相集Mineral Photography

Definition of bridge

i. A rock fragment, cavings, or other obstruction that lodges (either accidentally or intentionally) part way down in a drill hole (such as in an oil well).

Ref: AGI

ii. Debris that plugs a borehole at a point above the bottom. Between the underside of the bridge and the bottom of the drill hole, the borehole is free of debris.

Ref: Long

iii. To deliberately plug a borehole at a point some distance above its bottom.

Ref: Long

iv. To form a bridge in a drill hole.

Ref: AGI

v. In a cave, a solutional remnant of rock that spans a passage from wall to wall.

Ref: AGI

vi. A device to measure the resistance of a wire or other conductor forming a part of an electric circuit.

vii. A piece of timber held above the cap of a set by blocks and used to facilitate the driving of spiling in soft or running ground.

viii. Refers to the overburden used for spanning the natural gap between the highwall and the spoil, when such is required to establish a temporary machine surface standing area closer to the disposal area than that provided by the virgin ground.

Ref: AGI

ix. In an electric blasting cap, the wire that is heated by electric current so as to ignite the charge.

Ref: Nichols, 1

x. Sometimes, the shunt connection between the cap wires.

Ref: Nichols, 1

xi. A plankway or elevator used in ironworking to convey fuel or ore to the mouth of a furnace.

Ref: Webster 3rd

xii. A refractory bar, or member, or fire clay placed across the surface of the batch in a tank furnace near the working end to hold back the scum, or gall.

Ref: Mersereau, 2

xiii. The structure formed by the end walls of the adjacent melter and refiner compartments of a tank and the covers spanning the gap between the end walls.

Ref: ASTM

xiv. See: air crossing


 
矿物 and/or 产地  
版权所有© mindat.org1993年至2020年,除了规定的地方。 Mindat.org全赖于全球数千个以上成员和支持者们的参与。
隐私政策 - 条款和条款细则 - 联络我们 Current server date and time: 2020.4.2 10:52:27
Go to top of page