ถ้าคุณชอบ The Pipe Fitters Blue Book

W. V. Graves

It the pipefitting bible for guys in the trade , a life saver…

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IPT's pipe trades handbook

Robert A. Lee

Pipe fitter's math guide

Johnny E. Hamilton

The pipe fitter's and pipe welder's handbook

Thomas W. Frankland

Mathematics for plumbers and pipe fitters

Smith, Lee