Ihe nkedo nke Gongbing nke na-egwupụta onwe ya na-anakwere teknụzụ German, nwere atụmatụ ezi uche dị na ya, ike arịlịka siri ike ma dị mfe iji:
Ngwa ngwa eji eme ihe niile sitere na nnukwu ụlọ ọrụ nchara ụlọ ma nwee ike izute ihe siri ike chọrọ nke bolts dị elu: teknụzụ ọgwụgwọ elu ụwa kachasị elu, mgbochi corrosion na nguzogide ihu igwe bụ okpukpu 5 karịa nke ngwaahịa galvanized nkịtị.
Igwe mmiri EPDM ejiri mee ihe nwere akara dị mma, nguzogide okpomọkụ, nguzogide kemịkalụ,
Nguzogide nrụgide dị elu karịa igwe EPDM nkịtị.
A na-eji waya ọdụ ụgbọ elu hexagonal eme ihe maka idozi taịlị nchara agba nke ihe owuwu nchara, a na-ejikwa ya maka idozi efere dị nro na-ewu ụlọ dị mfe, yana ijikọ ọla na ọla dị ka keels nchara, keels osisi, na profaịlụ aluminom.