That's a big complaint, might want to consider visiting the forums on
http://thegreatmodel8.net
81B
The GCF is 27b.
3 x 3 x 3 x 3 x b = 81b
The GCF is 9.
The GCF is 27b.
The Electric Company - 1971 81B 6-81 was released on: USA: 7 February 1977
1937-1940 (only the 81B, 81BE in 1940).
First some background info on the Model 81 Made from 1936 to 1950 , @ 55,581 produced. aw several asking prices for the model It was offered in the follwing grades: 81A Standard 81C Special (changed to 81B) 81D Peerless 81E Expert 81F Premier Yours could be worth 175 to 1000 depending on grade.
The letter behind the number refers to the durometer "hardness" of the wheel. In the case of the wheel in question, it must be a dual durometer wheel, meaning the core is harder than the outer part of the wheel.
According to the FAO statistics for 2010, the ten most important crops were: By economical value: Rice ($175B, 672,016BT) Wheat ($81B, 650,881BT) Soybeans ($65B, 261,578BT) Corn ($55B, 844,405BT) Sugar cane ($54B, 1,685,445BT) Tomatoes ($53B, 145,752BT) Potatoes ($44B, 324,182BT) Vegetables ($41B, 240,115BT) Grapes ($39B, 68,331BT) Cotton ($34B, 23,488BT) By weight: Sugar cane ($54B, 1,685,445BT) Corn ($55B, 844,405BT) Rice ($175B, 672,016BT) Wheat ($81B, 650,881BT) Potatoes ($44B, 324,182BT) Soybeans ($65B, 261,578BT) Vegetables ($41B, 240,115BT) Cassava ($22B, 229,541BT) Sugar beet ($9B, 228,452BT) Tomatoes ($53B, 145,752BT)
I can't get a definite answer, but I've hear both a 5 and a 9 USA. I guess the 5 could be something other than a 'USA'. Idk.
A haze filter, typically an 81A or 81B Wratten-type filter is used to cut down the amount of ultraviolet light entering the camera's optics. You can use this instead of a clear glass filter to protect the front element of your camera lens. There are two types of polarizing filters - linear and circular. Depending on your type of camera (film versus digital), you may need to use a circular polarizer to be able to see through the lens system. Polarizers cut down the amount of light entering the lens by acting like a set of Venetian blinds and letting light only come in as a single plane. There is more information on polarizing filters in the question In photography what does a polarizing filter do?