Double screw pump is a kind of double suction not airtight double screw pump.

双螺杆泵为一种双吸式非密闭的双螺杆泵。

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Double screw pump is a kind of double suction not airtight double screw pump.

双螺杆泵为一种双吸式非密闭的双螺杆泵。

youdao