It is believed that priority is given to reverse direction drive in the case that it may be driven in ether directorreverse direction, especially under large water flushing conditions.
并认为在斜井既可正掘又可反掘的条件下,尤其是在涌水量较大的情况下应优先考虑反掘方案。
2
A patent prevents direct copying, but does not prevent learning from a new product or developing a competing product through reverse engineering.
Its Fail Safe High or Low will return the output to 3 psig for Direct Acting Mode or to 15 psig for Reverse Acting Mode if the power is lost, regardless of the logic selected.