再次请教:两种SOT-23贴片元件的型号.

1、三极管,封装为SOT-23,正面标有“1M”,并有倒着的“U”形字样;
2、SOT-23封装的二极管(两个二极管封在一起),正面标有“C3t”,和倒着的“61”字样.
请问这两种元件的型号分别是什么?
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