PHYSICAL PROPERTIES IF NATUREAL RUBBER PROCESSED FROM COAGUCUM OF LATEX COAGULATED WITH"ALUMINUM POTASSIUM SULFATE DODECAHYDRATE" [KA1(SO4)2.12H2O],លក្ខណៈរូបរបស់កៅស៊ូធម្មជាតិកែច្នៃចេញពីជ័រកកដែលត្រូវបានបង្កកដោយ«អាលុយមីញ៉ូមប៉ូតាស្យូមស៊ុលផាតដូដេកាអ៊ីដ្រាតេ» [KA1(SO4)2.12H2O] THUN SATYI,ធុន សាទយី RUB THU 2020 B477 Or. phnom penh rua 2020 2020 Text xii.59p. https://drive.google.com/file/d/1sPbADQN1z35-h4v9MZsnbBlnxMuujRv6/view?usp=sharing