Exact(52)
Two types of drive mechanisms are used on electric wheelchairs: indirect drive and direct drive systems.
Mountain snowmobiles have uncomplicated drive mechanisms — throttle, brake, no gearshift, no reverse — and, as I learned after we crested an abrupt declivity, almost no traction when the sled is moving steeply downhill on its runners.
In contrast, imprinted genes that allow expression of maternally inherited alleles will tend to drive mechanisms to prevent the disproportionate utilization of resources by the fetus.
But Kent questions whether its rivals really can produce their display materials plus their drive mechanisms for those kinds of prices.With so many different applications, however, the $30 billion market for electronic displays would seem big enough for all.
Other drive mechanisms considered include fracture closure and water expansion.
Moreover, link drive mechanisms [19, 20] and parallel link mechanisms [21 23] are proposed.
Similar(8)
A number of gene-drive mechanisms have been proposed (Sinkins and Gould 2006), and one drive mechanism, Medea, has recently been successfully engineered in Drosophila (Chen et al. 2007).
Regev compared gene-drive mechanisms, which alter the genetics of species, with cancer immunotherapy, where a person's immune cells are leveraged to attack his tumors.
Individually suspended wheels are simplified for rear-engine, rear-wheel-drive cars and front-engine, front-wheel-drive mechanisms.
The system is not as sophisticated as some, like Audi's or Subaru's, that continuously apportion power to all four wheels; nor is it likely to keep up with the rugged four-wheel-drive mechanisms of many truck-based S.U.V.'s.
Fig. 17 Double-screw-drive mechanisms Fig. 18 Universal joints.
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