It is entirely possible to stop, refactor, be a little behind on features, slam in a few features, not catch up but screw up the code, and loop forever, never getting benefit.

停下来、重构、稍微落后于特性、专注于少量特性、不赶进度而是优化代码，如此循环往复，却从来不受益；这样的状况完全有可能。

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Screw pump should be in suction stop valve fully open under the condition of starting, in case of overload or empty.

螺杆泵应在吸排停止阀全开的情况下起动，以防过载或吸空。

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If the operator mounting holes do not line up with the valve flange holes, the stop screw (s) should be backed off and handwheel turned until holes are aligned.

如果操作装置的安装孔与阀门法兰孔没有对应上，就要把锁定螺栓退回，旋转手轮式的螺栓孔对准为止。

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