app.dnp.go.thapp.dnp.go.th/opac/multimedia/research/154_43/chapter2.pdf · cype (screw (spade) 30 V...

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Transcript of app.dnp.go.thapp.dnp.go.th/opac/multimedia/research/154_43/chapter2.pdf · cype (screw (spade) 30 V...