There are three Li ting - typical methods: (I) A direct pull may be applied to the hook, either by screws, or by a cylinder fitted with is piston and rod and actuated by direct hydraulic or other pressure, as shown diagrammatically in fig.
The later English artists have somewhat changed the mode of communicating motion to the slides, by attaching the screws pdrmanently to the micrometer head and tapping each micrometer screw into its slide.
One reply to this is that it is not difficult to determine from time to time the errors of the screws and to apply the necessary corrections to the observations.
"I want to stop him before he screws up a real missing person case by sending the police off on a snipe hunt," he snarled.
Not if it screws up what we're doing... what we should be doing right now, instead of talking about my love life.