Isikhomiso sokuqhuba amanzi sesandla Tonda seShandong sisethemba ukuthi lokhu liziphumule inqanaba yamanzini ngokushesha ngokugcina uhlobo olunye (20–45 idigidi) ngepaneli zokuqhuba amanzi ezithunyelwe polyurethane. Ukusetyenziswa kwesikhombisi esihlanganyeli kuhlelisa ukuhlala kakhulu kwezilimo, ngoba amanzi afika ngqukuze kwezilimi zesikhiyiyo (0.5–3 mm) ngaphandle kokuba imibuzwana azaliswa ngaphakathi ngenqanaba yesikhomiso. Ezisheshe polyurethane ayiqabane ngokubhedelela kwezinye izinto eziphathelayo amanzi amaphi ane emanzini okanye amaphi ane amanzi amangazi, uzame ukusebenza ngokupheleleyo kwiqhaza labo lominingi, uprosesha wemitali, okanye uprosesha wokulima amabhadi. Isikhomiso sikhiyiyo sifundiswa ngokungahlukele iindlela zokuhlula kwekhonjane ukuthola amagama alandelene, nokukhetha amoduli ezintshabalaleni zokuvibela ukuthola ukusuka kwezimbali. Lalela nethu ukubona ukuthi zingabi amakhomiso akhona esihlanganyeleni ukuthola ukusetyenziswa kweziqhaza zakho ezinethunyelwe ngezinye izinto.