Ukuqonda Ama-PU Sand Wraped Tubes: Izicelo nezinzuzo ku-Metallurgy and Energy

--- Amashubhu asongiwe esihlabathi e-PU amele intuthuko enkulu emkhakheni wezinto zepayipi, ikakhulukazi ngaphakathi kwensimbi, imikhakha yezimayini, namandla. Lawa mashubhu akhiwa ngokusonga ungqimba lwe-polyurethane (PU) ezungeze umnyombo owenziwe ngesihlabathi, okuhlinzeka ngenhlanganisela eyingqayizivele yamandla, ukuguquguquka, nokufakwa okushisayo. Ukuqonda ukwakheka nokusetshenziswa kwebhubhu yesihlabathi se-PU esongiwe