| 单词 | shoe-valve |
| 释义 | > as lemmasshoe-valve shoe-valve n. (see quot. 1875). ΘΚΠ society > occupation and work > equipment > pump > [noun] > valves clap1626 clack1634 clapper1769 butterfly valve1809 suction valve1831 clack-valve1850 shoe-valve1858 butterfly clack1859 trap-valve1877 1858 Skyring's Builders' Prices 100 Long Spindle, or Shoe Valves. 1875 E. H. Knight Amer. Mech. Dict. III. 2164/1 Shoe-valve,..a valve at the foot of a pump-stock, or at the bottom of a reservoir. < as lemmas |
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