Hanyoyin sadarwa na HRC
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HRC Coulings Cikakken Saiti Nau'in F/H/B tare da Spider Rubber, HRC70 ~ HRC280
HRC Semi na roba couplings don amfanin gaba ɗaya. Akwai shi azaman nau'in flange F, daji da aka ɗora daga ciki, da H flange daji, wanda aka saka daga fuskar waje. Hakanan nau'in flange B.