A first version, patented in 1869, had a glass disc with eight phases of a movement and a counterrotating glass shutter disc with eight apertures. The discs depicted Ice Skaters, Fishes, Giants Ladder, Bottle Imp and other subjects. An improved version had 13 images and a single slot shutter disc and received British Patent 2685 on 10 October ...A disc harrow is a harrow whose cutting edges are a row of concave metal discs, which may be scalloped, set at an oblique angle. It is an agricultural implement that is used to till the soil where crops are to be planted. It is also used to chop up unwanted weeds or crop remainders.. It consists of many carbon steel discs, and sometimes longerlasting boron discs, which have many varying ...
Best representation descriptions:
Related searches:
available on Telegram t.me/liriklaguok
Posts
