Hello colegues,

I do not know it it is right category, but I am a bit dubt so I need to ask question
So can somebody explaine if there are any diferences between mentioned threads?

I do have to make:
4 1/2 API IF LOW TORQUE
5 1/2 API FH LOW TORQUE
6 5/8 API REG LOW TORQUE

I would like to thank in advance for any usefull information.

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