The plane made a smooth landing.
飞机平稳降落。
The cart moves along a perfectly smooth and horizontal plane after the push.
小车在被推之后，就沿着绝对光滑的平面运动。
Plane blade cutting, manual cutting feed, and with smooth end surface.
平刀裁切，手动进刀，端面平整。
Plane blade cutting, manual cutting feed, and with smooth end surface.
平刀裁切，手动进刀，端面平整。
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