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。
The computing procedure of all profiles design for double screw pump has been.
介绍了双螺杆泵各类型面设计的计算机设计程序。
Double safety unit prevents screw tap from wearing out.
二重安全离合器装置能防止丝攻之折损。
Structure for the straight screw, single screw, a warhead double-helix single screw, twin screw three.
结构为直螺旋，有弹头单螺、双头单螺、双头双螺三种。
Structure for the straight screw, single screw, a warhead double-helix single screw, twin screw three.
结构为直螺旋，有弹头单螺、双头单螺、双头双螺三种。
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