ʻO ka billet i hoʻohana ʻia i ka hana ʻana i nā paipu kila i kapa ʻia ʻo tube billet.Hoʻohana mau ʻia ke kila poepoe paʻa kiʻekiʻe (a i ʻole ke kila ma ke ʻano he paipu paipu.E like me nā ʻano hana like ʻole, ua loaʻa i nā paipu liʻiliʻi nā billet i hana ʻia me nā ingots kila, hoʻolei mau ʻia nā bila, forging billets, rolled bi...
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