31. Land is now surveyed and registered in metric units , although initial surveys used imperial units. 32. :: Notational point : the metric unit you speak of is not inverse square milliseconds. 33. Bicycles, especially at the high end, are increasingly being sold and sized in metric units . 34. Metric units are also shown, as required by law.35. It displays a quantity in terms of imperial / US customary units and metric units . 36. I would convert from metric units to imperial units every instance you need a conversions. 37. These can then be expressed as " height " differences by conversion to metric units . 38. *In Wikipedia articles, most measurements given in imperial units are also given in metric units . 39. Sometimes they use metric units , sometimes they use imperial. 40. With the introduction of phototypesetting in the 1970s metric units were increasingly used in typography.