Iityhubhu zentsimbi ezingenamthungo kwizibilisi zoxinzelelo oluphantsi naphakathi (GB3087-2018Zizityhubhu zentsimbi ezikwizinga eliphezulu zekhabhoni ezishushu eziqengqelekayo kunye nezitsalwa ngokubanda (eziqengqelekayo) ezisetyenziselwa ukwenza imibhobho yomphunga eshushu kakhulu, ukubilisa imibhobho yamanzi kwizakhiwo ezahlukeneyo zeebhoyila ezinoxinzelelo oluphantsi naphakathi kunye nemibhobho yomphunga eshushu, imibhobho emikhulu yomsi. , imibhobho emincinci yomsi kunye nemibhobho yezitena ze-arch kwiibhoyili ze-locomotive.

Iziphelo zombhobho wensimbi kufuneka zibe yi-perpendicular kwi-axis yepayipi yensimbi, kwaye i-burrs kufuneka isuswe.GB3087Umbhobho wentsimbi oqhelekileyo wenziwa ngentsimbi eyi-10, 20 eshushu eqengqelekayo okanye ebandayo eqengqelekayo ekumgangatho ophezulu wekhabhoni yesakhiwo, idla ngokufuneka.uxinzelelo lwamanzie, ukuqhwanyaza, ukuvutha, ukucabakunye nezinye iimvavanyo zokuqinisekisa umgangatho wemveliso kunye nokusebenza.