单词	hand screw
释义	Hand screw a small jack for raising heavy timbers or weights (Carp.) a screw clamp. See also: Hand, Hand Hand screw Hand screw A clamp with two parallel jaws and two screws used by woodworkers; the clamping action is provided by means of the screws, one operating through each jaw. screw clamp screw clamp Any clamp set by means of a screw, but esp. one used in woodworking which has two large parallel jaws for holding the work to be pressed together.
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