Mesh column connection with the use of semi-circular bolt head square neck, with anti-theft rings and washers, to prevent the separation can be artificially demolition.
网片与立柱的连接采用半圆头方颈螺栓，配以防盗垫圈，能防止隔离栅被人为地随意拆卸。
方头螺钉的俯视图。
Side view of square head bolt with adjustable thread length.
螺纹长度可调整的平头一字槽螺钉的侧面图。
Side view of square head bolt with adjustable thread length.
螺纹长度可调整的平头一字槽螺钉的侧面图。
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