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Published by China Environmental Science Press Pub. Date :2009-, 2000
ISBN 10: 7802097398ISBN 13: 9787802097391
Seller: liu xing, Nanjing JiangSu, JS, China
Book
paperback. Condition: New. Language:Chinese.Pages Number: 74 Publisher: China Environmental Science Press Pub. Date :2009-12. With China s social development and urbanization continues to accelerate. the pace of work has also been refreshed with the record. it seems that the indoor environment people and completely separated from the external environment. working eight hours a day time. most people through the network. telephone and other modern communication tools to work or communicate with each other. often overlook.