| 释义 |
positioner|pəʊˈzɪʃənə(r), pə-|
[f. position v. + -er1.]
One who or that which positions; spec. a device or machine for mechanically moving an object into position and keeping it there.
1934in Webster. 1957E. B. Jones Instrument Technol. III. ii. 133 The positioner also corrects for movements of the valve stem owing to unbalanced forces on the valve plug. 1969Engineering 29 Aug. 216/1 A universal positioner,..with vertical table adjustment under full load, has been added to the range of manipulative equipment... Capacity is from 1 to 10 tons. 1972Physics Bull. June 363/1 A micrometer stage is used to traverse the resistor under an rf probe which is held by a vertical positioner. |