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seetõttu tuleb rongide tunnelites liiklemisel esineva maksimaalse rõhuerinevuse suhtes kehtivate, inimeste tervisega seonduvate kriteeriumide täitmiseks kas valida kõnealustele rajatistele õhuava ristlõike asjaomane pindala või kasutada abiseadmeid.
measures must therefore be taken, either through a sound choice of the air cross section of the concerned structures, or through auxiliary devices, in order to meet a health criterion, based on the maximum pressure variation experienced in the tunnel when a train passes,
proove tuleks valida mitmetest külmlao kriitilistest punktidest, näiteks, ukse juurest (ülevalt ja alt), külmlao keskelt (ülevalt ja alt) ning jahutusseadmesse suubuva õhuava juurest.
samples should be selected from several critical points in the cold store, for example: near the doors (upper and lower levels), near the centre of the cold store (upper and lower levels), and near to the air return of the cooling unit.