I kēia mau lā ʻoihana ʻoihana, hoʻohana ʻia nā paipu kila i nā ʻano hana like ʻole a ma nā ʻano he nui, he mea kupanaha. Ma waena o lākou, ʻo ASTM A106/A53/API 5L GR.B kila B, ma ke ʻano he mea koʻikoʻi paipu kila, makemake ʻia e nā ʻenekinia a me nā mea hana no kāna p ...
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