| 摘要 |
An oil suction pump has an air outlet normally closed by a valve controlled via a compression spring, and the valve may be pushed backward by flowing air to open the air outlet. Therefore, the oil suction pump may be connected to an air compressor or to a manual air pump to obtain flowing air to push backward the valve and thereby open the air outlet and vacuumize a container connected to the oil suction pump for sucking oil into the container. A user may freely select to operate the oil suction pump via the air compressor or the manual air pump depending on actual need.
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