A cikin tsarin bututun, kayan ɗamara sune mahimman abubuwan da ke sauƙaƙe haɗin gwiwa, reshe, canza alkibla, ko daidaitawa da nau'ikan bututu daban-daban.Daga cikin nau'ikan tsarin bututu da yawa, TH-HU (Thread-Hole-Union) hanya ce ta haɗin kai da ake amfani da ita, galibi ana amfani da ita don haɗa bakin karfe ...
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