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API 5CT b? usoro n'ime mman? nke American Petroleum Institute, kar?s?a maka pipe mman?, p?a na kasing.
h?kwuo
Astm A335 Pipe b? p?pu akú? a na - eji nn?? eme ihe. ?z? ?r?p?ta ya na - ag?nye iji ihe osisi na - ekpo ?k? na oyi.
API 5L PSL1 n’enwegh? nchaa na a na - enwegh? mman? a na - enwe a na - akp?sa.
Ihe a na - eme n’ihe a na - at?kwas? obi, na - ekwes?gh? ekwes? n’?t?t? oge, d? ka mmiri na - ekpo ?k? ?k?, mmiri.
Any? na - enye ha nile p?p?a ?ba API ma nwekwara ike ?ch?p?ta ihe nd? ? ch?r?.
A na - eji p?ta ?gb? mmiri Sa210 eme ihe kar?s?a n’ahú? nd? d? elu, n’ebe a na - enye nr?gide na nr?gide nd? ?z?.