This allows the equipment to achieve many spray-extraction cycles independent of the forward or backward motion of the machine.

Flight occurs either as hovering, or as forward or backward motion.

The pawl bears against the surface at an angle so that any backward motion will cause the pawl to jam against the surface and thus prevent any further backward motion.

The animal relies on the forward and backward motions of its head and neck to maintain balance and the counter momentum while galloping.

In addition to rotation, surge (forward and backward motions), sway (sideways motion) or heave (up and down motions) can be problematic with some technologies.

That was a backward movement.

He wrestled with the controls, eventually halting the backward movement, but picking up a horizontal drift in the process.

New variations allow a small amount of forward and backward movement.

The resulting loss of adhesion would have made the difference between net forward movement and net backward movement.

Two scratch classes were interpreted as resulting from forward or backward movement of the jaws.

The two edges of this new node then point backward to the 6th node of the path.

The teeth are reduced to small granular plates arranged in a quincunx on the jaws and vomer with the pointed tips pointing backward.

The toes of the hind feet are arranged in two opposable groups, with the fourth and fifth together, pointing backward when walking on the forest floor.

Likewise, the spinning wheels of a vehicle attempt to slide backward across the ground.

Near completion, he paused, causing the bike to slide backward as it lost grip on the wire.

When he realized he was copying the slide backward, he reversed the compass rose to make the directions correct.

One year at that time, a streetcar—which locals nicknamed “the ambulance”—was so overloaded on its way up the hill that it slid backward and nearly toppled.

By sliding backward, the remora can increase the suction, or it can release itself by swimming forward.