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4代和螺丝，一个作为胜利科技，另一个作为其他啥奖励（一时想不出来），只能用一个轮回，即这轮赢了，下轮可以用，再下轮就没了，想要再用就要靠打。同时增加可以时产或是降低科技花费，让大家都有个奔头。
我这个小农从第一轮开始到现在，还没出过螺丝呢:lost :lost :lost
:ai: 基本无论作为什么榜都很难有盼头的..
