When a lense is described as of 4 inch focus, it means that such a lens is capable of bringing parallel rays to a point at a distance of 4 inches from the lens.
Suffice it to say that they served as a means of uniting all workers in a work-place at a time when craft unions were split by politics and unable to cope with large-scale industry, that they won recognition from governments in many cases as an emergency measure to head off revolutionary unrest, and that in both Czechoslovakia and Poland they laid claim to a compulsory contribution from employers for welfare purposes.
The Air Force is scrambling the fighter jets.
Kipper drained his glass to the lees and seemed to become calmer.
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