API 5L
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APISPEC5L-2012 Carbon Seamless Steel Line Umbhobho 46th edition
Umbhobho ongenamthungo osetyenziselwa ukuthutha umgangatho ophezulu we-oyile, umphunga kunye namanzi atsalwa emhlabeni ukuya kushishino lweoyile negesi kushishino ngombhobho.
