Double-valve automatic grinding device
The utility model provides a double-valve automatic grinding device which comprises a shell, a spring pre-tightening knob, a spring pre-tightening screw, an upper piston, a spring, a lower piston, two guide rods, a rotary mechanism and a support frame. A hollow cavity is arranged in the shell, the s...
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Format: | Patent |
Sprache: | eng |
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