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The code for creating the object is encapsulated and the specific factory class is instantiated, thus achieving the purpose of encapsulation and instantiation. Encapsulating the code that creates the object in one place can also achieve the purpose of reuse and is more convenient for later maintenance. This also means that when the customer instantiates the object, he will only rely on the interface and not on the specific implementation. Help us to better achieve interface programming rather than implementation, making the code more flexible to cope with future extensions.该剧于2017年3月25日在南京开机。[2]就在令狐冲和岳灵珊吵吵闹闹的时候，远处一道凌厉的剑气****过来。Therefore, operators must support their selected frequency bands and some selected roaming bands; Terminal suppliers, on the other hand, tend to provide a small but diversified number of terminal products to increase their sales. This will lead to an increase in the demand for band support. Another result is that the use of frequency bands does not require reliance on Radio Frequency Access Technology (RAT), but the radio must still be able to identify various RATs used and take corresponding actions.I also think the question of commission is the attribute of technical defense. I thought that technical defense was a big move, but seeing the big melee move of the ladder would reduce the damage with the superposition of the opposite defense. It can be seen that it may not matter much. The mage's general attack magic damage will also be reduced by the opposite defense. What exactly is the technical defense going to do?@ sm0004011. Only when one ship can be visually seen from another ship should two ships be considered to be seeing each other.