... square-headed bolt 方角螺栓、方头螺栓 square-hole screen 方孔筛 square-mesh sieve 方眼筛、格子筛 ...
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square hole screen 方孔筛
The electrostatic screen for a transformer comprises an insulated ring on which a square hole is arranged. A leading wire passes through the square hole.
该变压器静电屏，包括绝缘圈，绝缘圈上有方孔，有引线从方孔中穿过。
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