| 单词 |
well-hole |
| 释义 |
well-hole
[well n.1]
1. a. An opening through a floor or series of floors, for a staircase, chimney-stack, or for the admission of light, etc.
1680Leybourn Primatt's City & Country Purchaser iii. 187 Note..that..you do afterwards take the dimensions of the Well-hole for the Stairs. 1690― Curs. Math. 901 In the measuring of flooring,..you must deduct out of it the Well-holes for the Stairs and Chimneys. 1791Smeaton Edystone L. (1793) §42 A Well Hole was begun to be left upon these courses for stairs in the center. 1819Rees Cycl., Well-hole, in Building, is the hole left in a floor, for the stairs to come up through. 1892Dict. Arch. (Arch. Publ. Soc.), Well-hole,..the opening through a floor or floors, in a large warehouse, whereby light can be obtained from a glass roof over it, to each floor.
b. The empty space round which the stairs of a winding staircase turn.
1823P. Nicholson Pract. Builder 185 Stairs that have a well-hole, or hollow in the centre, are called geometrical stairs. 1825J. Nicholson Oper. Mech. 597 A cylinder..of the size of the well-hole of the staircase. 1833Loudon Encycl. Archit. §423 The well-hole of the stair is shown at m.
c. A vertical passage-way (for machinery, a lift, etc.); a shaft.
1841S. C. Brees Gloss. Civil Engin. 297 Well-hole, a hole connected with some mechanical contrivances, and adapted for the reception of a counterbalancing weight, and for other purposes. 1862Catal. Internat. Exhib. II. x. 5 The uprights or guides of the shaft or well-hole [of a lift].
2. The compartment at the lower end of a ship's pump.
1774Phil. Trans. LXIV. 412 If..plates of copper..were..continued down the main-top-gallant-mast, the main-top⁓mast, and part of the main-mast, into the well-hole. |
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