Some friends don't understand the difference between the square meter and the extended meter used in the installation process of the iron guardrail, so they don't understand how to calculate the installation quantities of the iron guardrail.

　　通常情況下，鐵藝護(hù)欄的安裝工程量是按照平方米計(jì)算的，也可以按照?qǐng)D紙的尺寸按照投影面積進(jìn)行計(jì)算得出。延長(zhǎng)米是在計(jì)算重量的時(shí)候使用到的。計(jì)算面積不適用延長(zhǎng)米。

　　In general, the installation quantity of iron guardrail is calculated in square meters, and it can also be calculated according to the size of the drawing and the projected area. The extension meter is used to calculate the weight. The calculation area does not apply to the extension meter.

　　一般情況下，濟(jì)南鐵藝護(hù)欄生產(chǎn)廠家是按照平方米進(jìn)行報(bào)價(jià)的，所以安裝工程量按照平方米計(jì)算是更簡(jiǎn)便快捷的方法。

　　In general, Jinan iron guardrail manufacturers quote according to square meters, so the calculation of installation quantities according to square meters is the most convenient and quick method.