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Bakin Karfe Karfe波纹膨胀硬币
金属伸缩接头kuma ana kiransa madaidaicin ƙwanƙolin ƙarfe, wanda aka haɗa shi da ƙwanƙolin ƙarfe dana 'urorin haɗi kamar ƙarshen bututu, tallafi，法兰da magudanar ruwa。Ana iya amfani da haɗin haɓaka ƙarfe donɗaukar girman canje-canje na bututun, magudanar ruwa da kwantena waɗanda ke haifar da faɗɗawar zafi da ƙanƙantar sanyi, ko don rama ƙaura, juyawa da matsugunan bututun, magudanan ruwa da kwantena。Hakanan ana iya amfani dashi don rage amo da rage girgiza。