| 摘要 |
A compact pumping unit (11) comprises a pump (28), a degasifier (34, 38), a non-return valve (78, 82) and a by-pass valve (54, 56), all contained in a unit (34, 50) which determines, furthermore, a first chamber (52), a delivery chamber (85) and a recirculation chamber (75). The unit (34, 50) is housed inside a body (12) of the pumping unit (11) and the pump (28) and the motor (30) are associated therewith.
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