单词 | spreader |
释义 | spreader [`spred·ǝr] CIVIL ENGINEERING A wood or steel member inserted temporarily between form walls to keep them apart. ELECTRICITY An insulating crossarm used to hold apart the wires of a transmission line or multiple-wire antenna. MECHANICAL ENGINEERING 1. A tool used in sharpening machine drill bits. 2. A machine which spreads dumped material with its blades. MINING ENGINEERING 1. A horizontal timber below the cap of a set, used to stiffen the legs, and to support the brattice when there are two air courses in the same gangway. 2. A piece of timber stretched across a shaft as a temporary support of the walls. |
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