此外，在理解透second马的关卡精妙之后，你还能花上不少时间研究自己的关卡，这种“设计”的乐趣，大概只有《创世小玩家》能get得到。All are of metal, as are the 4 molded-in slide "rails" that evaluate about 0.4" in size and can be found in pairs in the rear of the receiver and above and forward of