弯头应该用螺栓固定在湿井地面，并且设计成具有不需要任何螺栓、螺母或皮带即可连接泵设备的连接法兰的能力。
The elbow shall be bolted to the floor of the wet-well and be so designed as to receive the pump connecting flange without the need for any bolts, nuts or clamps.
连接法兰和螺栓组应由通风机厂配做。
Adapting flanges and bolt groups shall be produced in sets (be match-made?) by the ventilator manufacturer.
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