см. тж. препятствовать попаданию ; проникновение в
• To prevent water entering is one of the aims of mine drainage.
• Adhesives seal against entrapment of moisture between surfaces ... .
• The counter-gravity flow of the inhaled air reduces the entry of heavier dust particles into the filtering medium.
• Motors on the milling heads are totally enclosed to exclude ingress ( or penetration ) of metallic dust generated by the cutters.