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API 5L/ASTM A53 GR.B, LSAW Paipu kila kabone
na admin ma ka 21-03-31

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API 5L/ASTM A53 GR.B, ERW Paipu kila kalapona
na admin ma ka 21-03-31

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API 5L/ASTM A106 GR.B, Paipu kila kabone maʻemaʻe
na admin ma ka 21-03-31

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Pehea e hana ai me nā kiko ʻino kila kila?
na admin ma ka 21-03-30
Hiki iā mākou ke hoʻomaka mai nā manaʻo ʻelua o ka physics a me ke kemika.Ke kaʻina hana kemika: Ma hope o ka pickling, he mea nui e holoi pono me ka wai maʻemaʻe i mea e wehe ai i nā mea haumia a me nā koena waikawa.Ma hope o ka hana ʻana me nā lako polishing polishing, p...
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API 5L/ASTM A53 GR.B, paipu hao hao SSAW
na admin ma ka 21-03-28

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API 5L/ASTM A53 GR.B, LSAW Paipu kila kabone
na admin ma ka 21-03-28

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