| 释义 |
▪ I. torr Physics.|tɔː(r)|
Also Torr.
[f. the name of Torricelli (see Torricellian a.).]
A unit of pressure used chiefly in measuring partial vacuums (see quot. 1958); 133·32 newton/sq. metre.
1949S. Dushman Sci. Foundations Vacuum Technique i. 4 In German literature, 1 Tor (or 1 Torr) is used to designate 1 mm Hg pressure. 1958Gloss. Terms Vacuum Technol. (B.S.I.) 7 Torr, a unit of pressure defined by the relationship: 760 torr = 1 standard atmosphere (atm) = 1 013 250 dyn/cm2 exactly. 1 torr is equal to the conventional barometric millimetre of mercury..within 1 part in 7 × 106. Ibid. 20, 1 torr = 1·333 22 millibar (mb) approximately. 1981J. B. Adams in J. H. Mulvey Nature of Matter vii. 151 It is necessary to achieve a very low pressure in the vacuum chamber; pressures of 10–11 Torr are essential.
▪ II. torr(e
obs. form of tor n. |