现货供应港式护栏 东莞马路隔离栏 交通安全防撞栏

现货供应港式护栏 东莞马路隔离栏 交通安全防撞栏

Spot supply port type guardrail Dongguan Road Barrier traffic safety barrier

立柱纵向位置的确定：先在路缘石上用红铅笔根据立柱间距划出横线.

Determine the vertical position of the column: first draw a horizontal line on the curb according to the column spacing with a red pencil

再用线绳和钉子顺路方向上放出一条线.

Then use the string and nail to set out a line along the way

反复调整线形，然后用红铅笔在这条线上划出与横线垂直的纵线.

Adjust the alignment repeatedly, and then draw a vertical line on this line with a red pencil