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Da: liu xing, Nanjing JiangSu, JS, Cina
paperback. Condizione: New. Paperback. Pub Date: 1985 Pages: 11 Language: Chinese in Publisher: China Building Industry Press for the protection of sewer maintenance job safety and health of workers. according to former State Urban Construction Administration and the National Bureau of Labor (81) City Fa Zi No. 247. by the Tianjin Municipal Engineering Bureau is responsible for the preparation of the safety technical specification for sewer maintenance. our joint review of currently approved for the Ministry of standard.
paperback. Condizione: New. Ship out in 2 business day, And Fast shipping, Free Tracking number will be provided after the shipment.Postcard: Wulingyuan (each 12 full)Four Satisfaction guaranteed,or money back.