The control is a  technical act enabling the conformity of a product to be determined. To carry out a check on a product, you must first determine its characteristics and choose the limits (machinists would say tolerances) within which the product complies

The main characteristic of a cellar (from the Latin cavita, “dug place”) is to be located at least partly below ground level. In this way it is similar to the cave but is distinguished by the fact that it is created by man. The cellar differs from a tunnel because it is not intended for mobility. The crawl space is distinguished from the cellar by its low height, by its ventilation and by its purpose.

Customer service, or more frequently customer service in French-speaking Canada, is the provision of services to customers before, during and after a purchase. It is possible to contact customer service by telephone, email, chat or by post.