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PREFACE

Alhamdulillah all praises to Allah ,with Allah’s will we are able to finish writing
this book despite many problem facing by us but we manage to overcome it As the authors

of this book we would like to thank our colleagues and also thank the organizations that
helped us throughout the publication process, especially for those who contribute in terms

of ideas, time and advices.There are many who involves in this publication and we are not

able to write down all of them ,but we know who they are. Hopefully this book can help
readers and students of Mechanical Engineering at Polytechnic especially Polytechnic Kota

Bharu.

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