Diameter of base cylinder and base circle of involute gear and cycloidal gear.

One foot = 12 inch = 0.3048m.

Your question is the content of "Chicago Mercantile Exchange timber futures contract", right?

But I don't know what you mean by "converting to China standard" ...

Related information:

Non-standard length wood

Marketing unit110,000 non-standard length wood (eight feet to twenty feet), with a base circle diameter of feet, a thickness of two inches and a width of four inches.

The quotation unit is cents/1000 feet.

The minimum change price is 0. 10 USD/1000 feet (1/kloc-0 USD/.00 USD/contract).

The maximum fluctuation of daily price is limited to $65,438+00 per thousand board feet higher or lower than the settlement price of the previous day.

The delivery months of the contract are 1, 3, 5, 7, 9, 1 1.

Open bidding during trading hours: Monday to Friday from 22: 00 to 02: 05 (Beijing time).

The last trading day is the business day before the sixteenth Gregorian calendar day of the delivery month.

Delivery date Any business day after the last trading day of the delivery month of the contract.

The delivery grade of the delivered goods shall meet the testing standard requirements of the American Timber Standards Board and/or the regulatory agency designated by the Canadian Timber Board.

Delivery method physical delivery

Non-standard length wood (eight to twenty feet) with a thickness of two inches and a width of four inches. The percentage of different lengths of wood in the total length is as follows:

Length accounts for% of total length.

8' 3% to 10%

10' 5% to 12%

12' 10% to 20%

14' 10% to 24%

16' 35% to 60%

18' 0% to 15%

20' 0% to 15%

16'+18'+20' 45% to 60%

Transaction code LB settlement: LB

Listed exchange CME