Most often used phrases:
canon efef lens
junkers ef
ef lenses
ef f
ef education
ef mount
ef hand
extender ef
ef series
ef scale
remmers ef
ef victory
ef march
ef falcon
'ef' used in million biggest domains list by Alexa.com:
sourceforge.netreference.com
themeforest.net
wordreference.com
thefreedictionary.com
gutefrage.net
'ef' used in other domains:
globalbenefitadministrators.comchefadair.com
chiefbrody.com
reformationpubs.com
reformationpublishing.com
thechefssecret.com
Statistical data
"ef" has the frequency of use of 0.0001% on city-data.com forum
"ef" has the frequency of use of 0.0001% on en.wikipedia.org.
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