Improvement design of existing threshing machine at Kilang Sawit Risda, Ulu Keratong -н Gelau, Daryl, Ting, Joseph Zhi Ho, Chen, Chit Wee, Mohd Rafli, Izzat Emeer, Yahaya, Mohamad Amirul Ashraf, Ramlan, Ikhsan Mustain, Tajurahim, Nurul Ainina Nadhirah, Mahmood, Salwa, Ngadiman, Nor Hasrul Akhmal

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