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in the heat treatment industry. they are also referred to as a "backing" pump when used in combination with a booster pump, or with both a booster and secondary ("high vacuum") pump, typically a diffusion style. a rotary vane pump can also be used alone when high vacuum is not required and slower pump-down...
inter alia. dcf signals are used for example in railways, radio and television stations, computer systems, communications and industry. the dcf signal is also used for synchronizing home clocks and even some wrist watches. devices using dcf may automatically switch from daylight savings time to winter...
textile articles of a kind suitable for industrial use knitted or crocheted fabrics articles of apparel and clothing accessories, knitted or crocheted articles of apparel and clothing accessories not knitted or crocheted other made up textile articles; sets; worn clothing and worn textile articles; rags...