2017914(木)

In some cases the brightness

In some cases the brightness (lumens) required for projection far outweigh the necessity to increase projection lamp life with the use of long life lamps. In fact in some areas this voltage may swing from as much as plus or minus three or four volts.






 コメント(0件)コメント欄はユーザー登録者のみに公開されます 





 カウンター
2017-09-14から
60hit
今日:1


戻る