| 摘要 |
648,119. Exhaust pipes. BROWN TRACTORS, Ltd., D., and DEARNLEY, K. Nov. 26, 1948, No. 30685. [Class 7 (ii)] Rain is prevented from entering the vertical exhaust pipe b of a tractor engine by a pivoted cover a which is snapped open against a spring e, by the pressure of the exhaust gas. When the engine has stopped, it is closed by hand and during slow running at starting, exhaust escapes by a narrow passage c.
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