He bought a thin metal plate with a hole at the centre.
他买了块中心有孔的薄金属板。
These experiments include tension experiment of a plate with a hole, vibration and turn experiment.
这些实验包括带孔板件的拉伸实验、板件的振动实验、板件的转动实验。
Small hole can be used with thin ropes if necessary, or as a belay plate.
细孔与幼绳同用或可作保护板用。
As the improvement, the material loading plate is provided with a through hole.
作为改进，在载料板上开有通孔。
As the improvement, the material loading plate is provided with a through hole.
作为改进，在载料板上开有通孔。
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