Heerkulka sunta cafiska ah ee adkeysta aaladda sunta ah ee sumadda leh waa shey calaamad loogu sameeyay badeecadaha leh shuruudaha hawlgalka jawiga ee heerkulka. Midabka dusha sare waa hufnaan, cadaan cad, dhalaal cad, asian, oo ah lacag dhalaalaya iyo caabbinta khafiifka ah, iska caabbinta khafiifka ah, iska caabbinta khafiifka ah, sababtuna tahay isticmaalka ashyaa'da, oo ay ku badan tahay Cadaadiska iska caabbinta, waxay u adkeysan kartaa hawlgalka warshadaha iyo habka kuleylka ee jawi heerkul sare ah, oo aan sahlanayn in la carqaladeeyo ama la xumaado. Qalabkan sumaddan ayaa ku habboon badeecadaha u baahan caabbinta heerkulka sare, sida qaybaha gawaarida, aaladda korantada, qalabka korantada, iwm si cad loo adeegsan karo, iwm. Shuruudaha heerkulka, hagaajinta isku halaynta iyo fikirka sheyga, oo ay siiso taageero adag wax soo saarka iyo adeegsiga alaabada. Shirkadda Donglai waxay inta badan soo saartaa isku-darka PVC, BAP Caymesive, PE Dameerin, PE PET, Pet Dameerin, warqad warqad kuleyl ah, warqad qoran, warqad qoxootiga ah iyo alaabta kale ee ku dhejiska ah.