Romanization of Greek Greek numerals which employed the entire alphabet, including the nonstandard letters digamma, stigma, or sigma-tau (placed between epsilon and zeta), koppa (placed between pi and rho), and sampi (placed after omega). As revised in 2001, ELOT 743 provides for the uncommon characters to be given (in Greek) as $ for stigma, + for koppa, and / for sampi. These symbols are not given lower-case equivalents. When used as numbers, the letters are used in combination with the upper "keraia" numeral sign ⟨ʹ⟩ to denote numbers from 1 to 900 and in combination with the lower "keraia" ⟨͵⟩ to denote multiples
Torque tube of the drive shaft and tunnel." The continuing limited production of the Avanti switched to a new chassis in 1986 that utilized a torque tube along with an independent rear suspension. The Mercedes SLS has a torque tube, but only to align the transaxle with the engine. Sine 1998 the Chevrolet Corvette from General Motors has used a torque tube since the introduction of the C5 version in 1996. Torque tube A torque tube system is a drive shaft technology, often used in automobiles with a front engine and rear drive. The torque tube consists of a large diameter stationary