TJ Mechanical engineering and machinery 61 Biomass 12 Malaysia 12 Construction industry 10 Environmental engineering 10 Palm oil 10 Productivity 9 Sustainable development 9 Machine design and drawing 8 Chemical engineering 7 Process engineering 7 Efficiency 6 Manufacture 6 Carbon 5 Construction 5 Fourier transform infrared spectroscopy 5 Product design 5 Product engineering 5 Torrefaction 5 Biocatalysis 4 Biotechnology 4 Industry 4.0 4 Materials of engineering and construction 4 Optimization 4 PYROLYSIS 4 Pretreatment 4 Systems engineering 4 X ray diffraction 4 Activated carbon 3 Agricultural wastes 3