| 摘要 |
mechanical engineering. SUBSTANCE: supporting structure has handle, blade unit engagement device providing positioning of blade unit for rotation around axis of rotation extending in parallel with longitudinal axis of blade unit, and pair of deformable levers, which connect handle to engagement device and allow engagement device to move downward toward handle. Pair of levers are positioned for restraining displacement of engagement structure in direction substantially perpendicular to direction of downward displacement. EFFECT: increased efficiency by providing free movement of blade unit while preventing it from undesirable displacements. 25 cl, 7 dwg
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