ʻOi aku ka maikaʻi o ka puʻupuʻu, ʻoi aku ka ikaika ma mua o ka paipu welded ERW.No laila ua hoʻohana nui ʻia i nā mea hana kiʻekiʻe, a me ka wela, nā ʻoihana boiler.ʻO ka maʻamau, ʻo ka wili kuʻi ʻana o ka paipu kila welded ka wahi nāwaliwali, ʻo ka maikaʻi e pili ana i ka hana holoʻokoʻa.ʻO ka paipu liʻiliʻi vs ...
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