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nous tenterons de définir ce qu'est le travail collaboratif, puis de voir quelles sont les pratiques collaboratives : d'une part entre enseignants et d'autre part au sein de la classe.

With more than 20 years manufacturing experience in compressed air filed, CMN, as a oil free screw compressor manufacturer, the products including oil-less air compressor, oil-free air compressor, all kinds of special gas compressor and matched after treatment equipments. certified with ISO9001, ISO14001, TUV, ce and other certifications, our products offers various compressed air solutions with FAD ranging from 15cfm to 2087cfm, pressure ranging from 2bar to 45bar. With continued R&D investment, CMN, the oil free screw compressor manufacturer has launched world's first 40bar oil free screw air compressor with water lubricated air end and world's first 1.2MPa scroll air compressor which filled international gap.