相对重量 meaning in English

relative weight
weight-to-payload ratio

Experimental results showed that this method was accurate , easy to operate and can he applied to quantitative analysis
实验结果表明，该方法准确可靠，测得异辛酸的相对重量校正因子为1 . 305 ，相对误差2 . 0 % 。
The ceramic - lined steel composite pipes are lighter than alloy pipes , cast iron pipes , and cast stone pipes , which reduces the expense of transportation and makes the pipes easier to install
陶瓷内衬复合钢管与钢管、耐磨合金铸管、铸铁管和铸石管比较，相对重量轻，便于运输和安装。