On the cylinder round top, are possible to found, different descriptions as, number of series (manufacture), date of the last testing, etc.

Last testing date must be held attentively under control, because in accordance with terms of law, cylinders that expired of testing must not be used, refilled or transported filled, incurring in expiration of the terms. It is mandatory evacuate the content and the restitution of container immediately to the supplier communicating the failure (expiring date).
как это название грамотно перевести?