The choice, then, is between better performance of an arbitrary key and easier maintenance of an operationalkey.
那么，选择就在任意键的更好性能和操作键的更易维护之间进行。
2
With special spanner according to instruction and requirement to roll operationalkey 90 degree, so that can achieve to open and close.
用专用扳手按指示要求转动操作键90度即可实现开关。
3
Characteristics, operationalkey and precaution of inoculation, preservation and quality standards of spawn capsules of edible fungi were introduced in detail in this paper.