| 摘要 |
PROBLEM TO BE SOLVED: To stop oil only by push-oil by providing a push-in type air vent valve on a gripping type oil feed pump. SOLUTION: This is a oil feed pump attached with a single-operated feed stopper provided with a push-in type air vant valve 2 on the gripping type oil feed pump. In using it, a suction pipe 3 is placed in a kerosene receiving tank and oil is supplied through a gripping pump 1 to a feed pipe 4 via the push-in type air vent valve 2.
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