英语词汇“draft box”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

†draft box n. an airtight tube or enclosure that at its upper end receives the discharge from a turbine and at its lower end extends below the level of the water in the tail-race; (originally simply draft).

ΚΠ

1840 Parker & McKelvey U.S. Patent 1658 The percussion and reaction wheel..is inclosed in a box or case, which is denominated a ‘draft’..the mouth of said draft-dipping into the water and being..below the level of the water in the tail-race.

1849 Jrnl. Franklin Inst. 48 402 The water passes from the wheels or rims into two air-tight chambers..called ‘draft boxes’, from which it passes into two air-tight iron tubes..called ‘draft tubes’, which..discharge the water beneath the surface of the lower level.

1927 Sel. Engin. Papers Inst. Civil. Engin. xxxiv. 3 Draught-tubes for hydraulic turbines may be either straight, or curved so as to divert the direction of flow through 90 degrees between the turbine and the tail-race.

1958 Engineering 28 Mar. 414/2 The draft tubes for two more units have been completed.

单词	draft box
释义	> as lemmas draft box †draft box n. an airtight tube or enclosure that at its upper end receives the discharge from a turbine and at its lower end extends below the level of the water in the tail-race; (originally simply draft). ΚΠ 1840 Parker & McKelvey U.S. Patent 1658 The percussion and reaction wheel..is inclosed in a box or case, which is denominated a ‘draft’..the mouth of said draft-dipping into the water and being..below the level of the water in the tail-race. 1849 Jrnl. Franklin Inst. 48 402 The water passes from the wheels or rims into two air-tight chambers..called ‘draft boxes’, from which it passes into two air-tight iron tubes..called ‘draft tubes’, which..discharge the water beneath the surface of the lower level. 1927 Sel. Engin. Papers Inst. Civil. Engin. xxxiv. 3 Draught-tubes for hydraulic turbines may be either straight, or curved so as to divert the direction of flow through 90 degrees between the turbine and the tail-race. 1958 Engineering 28 Mar. 414/2 The draft tubes for two more units have been completed. extracted from draftn. < as lemmas
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> as lemmas