tandems串翼自行车tandemn.串联；串联式自行车tandem connection串联tandem arrangment纵向排列tandem transistor双晶体三极管tandem stabilizer串联稳定器tandem gas engine串排复缸瓦斯发动机tandem solar cell串接太阳电池tandem-exchange汇接局tandem processors级联处理器tandem heat meter串联热量表tandem sheet mill串列式薄板轧机