| 摘要 |
A suction pump (1) for lifting equipment, having an air intake device (2) fo r drawing in air through an intake port (2a); an electric motor (3) for rotati ng the air intake device (2); and a pneumatic motor (4) which is connected to t he air intake device (2) by a free-~wheel connecting device (5) to rotate the a ir intake device (2) in place of the electric motor (3).
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