Русско-английский научно-технический словарь
см. тж. защищать от; предотвращать
• Keeping dust away from delicate components ...
• This kept the solution from coming in contact with air.
• Teflon seals keep out moisture.
• This resistance protects the contacts against accidental overload.
• Nickel coating protects plug valves against (or from) corrosion.
• Oil seals safeguard the bearings against dust and grit.