which Testing & inspection book

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they are both very books as i have them both...

if u r serious with testing get them both as they are both worth it...

GN3 is a must for ur C&G2391 testing and inspection.

 
What ^^^ he says. I've too have got both of them gn3 is a must and if your learning will be easiest to understand however the second has got proper photos showing where to stick probes in cu etc so I'd agree with Matt above and I'd get both like we have lol

 
I would 3rd that!! I have both books.

GN3 is the bible and a must.

Kithcher has got great pictures and really gave me confidence that I was testing correctly!

 
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