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paperback. Condición: New. Ship out in 2 business day, And Fast shipping, Free Tracking number will be provided after the shipment.Paperback Pages Number: 414 Language: Chinese. To promote the waterproofing work vocational training and vocational skills appraisal carried out in waterproof work practitioners in the implementation of the national vocational qualification certificate system. the Labor and Social Security Ministry of China employment training technical guidance center to complete development work on the basis of waterproof work national occupational standards (hereinafter referred to as the standard ). the organization of experts to prepare a national vocational qualification training course: water workers (the basics of beginner Intermediate Advanced technician). National Vocational Qualification training course: waterproof work (basic knowledge primary Intermediate Advanced technician) national occupational standards as the basis. and strive to reflect the content of professional activities. vocational skills as the core guiding ideology. outstanding vocational training features; structure. Tutorial for the water work areas of professional activities. according to a modular way. sub-junior. intermediate. advanced and technicians four grades write. Written specifically for the standard in the basic requirements. shared the basics of these four levels. including professional ethics. legal. security. health and other aspects of knowledge.Four Satisfaction guaranteed,or money back.