| 释义 |
rams·bot·tom safety valve
\ˈramzˌbäd.əm-\ noun
Usage: usually capitalized R
Etymology: after John Ramsbottom, 19th century British mechanical engineer
: a safety valve used especially on locomotives in which two valves are pressed down by a single spring attached to a crosspiece prolonged to form a hand lever by which the valves may be eased up to test their adjustment |