2. 1 1/4UNC female to 1 1/4UNC female,1 1/4UNC female to 5/8-11"（M16/1/2BSP） male,1 1/4UNC male to 5/8-11"（M16/1/2BSP） Female,1/2BSP male to5/8-11" （1/2bspM16）male
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