ERW carbon steel paipu vs spiral paipu: ʻO ka mea mua, ʻo ka ʻokoʻa ma waena o ke kaʻina hana ERW carbon steel paipu ʻo ia ka wili wela i ʻōwili ʻia ma o ka ʻōwili mau ʻana, ka hoʻohana ʻana i ka hopena ʻili kiʻekiʻe o kēia manawa a me nā hopena pili, i hiki ai i ka lihi o ka. hui pumehana coil, kaomi i ka t...
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