A Device for convenience of changing car's gear oil by Piong Yong Chuan. 2. Bicycle trailer by Hoo Wan Tim. 3. Dust collector by Heng Song Hwa. 4. Easy grass cutter by Lee Swee Seng. 5. Fish scalling device by Loh Boon Kheng. 6. Manually operated sawing machine by Pang Koon Fei. 7. Rotated pruning shear pole by Teo Ming Wei. - PIONG YONG CHUAN (Diploma in Mechanical Engineering project paper, 2001)