00859nam a2200181Ia 4500 CTU_227687 210402s9999 xx 000 0 und d 600 H847/Vol.2 How things work : The universal encyclopedia of machines London Paladin 1972 How things work supplies readily-understood answers to all the questions that perplex the layman and puzzle the inquisitive child in the age of the machine. It explains everything fromt he simplest household gadget to the most complex industrial process: the theory and practice of modern machines and methods from the ball-point pen to the jet engine, from the polaroid camera to radar. Công nghệ,Technology dqhieu Trung tâm Học liệu Trường Đại học Cần Thơ