廣州甲型護(hù)欄價(jià)格 城市安全隔離護(hù)欄 深標(biāo)系列護(hù)欄現(xiàn)貨

Guangzhou type a guardrail price city safety barrier deep standard series guardrail spot

在最初的防撞護(hù)欄施工中，我們都是假設(shè)路緣石絕對(duì)按設(shè)計(jì)標(biāo)高。

In the initial construction of anti-collision guardrail, we all assume that the curb is absolutely in accordance with the design elevation.

首先用水準(zhǔn)儀對(duì)每一個(gè)立柱位置的十字線進(jìn)行水準(zhǔn)測(cè)量。

Firstly, the cross line of each column position is leveled with a level gauge.

（不需水準(zhǔn)點(diǎn)，只測(cè)相對(duì)標(biāo)高）。

(no bench mark is needed, only relative elevation is measured).

根據(jù)這些數(shù)據(jù)計(jì)算出坡度。

The slope is calculated from these data.