area contraction,percentage of是什么意思

网络释义

用法例句

Applying path method to determine optimal cross section and ventilation press in ventilation network;

用通路法确定通风网络最优断面与风压

Analysis on cross section of inherent stress concrete member bar;

预应力混凝土杆件断面形式简析

Visualization of flow fields for section of passageways for pumping station;

泵站流道断面流场的可视化

Physical Model Test of Bank Protection Cross Section in Haiyang Nuclear Power Plant;

海阳核电厂护堤工程典型断面物理模型试验

Analysed and compared the water quality comprehensive indexes and years' variation of every sections and periods,it had grasped distributed character,years' variations,the sort of pollutants and the case of the water quality pollution of the Yili River.

分析比较了各断面、各水期的水质综合指数及年际变化 ,掌握了伊犁河水质分布规律、年际变化与污染物排序 ,以及伊犁河水质污染状况。

This paper discusses the relations between conversion friction coefficient(f)of "V"shape,ladder-shape, semicircular and circular sections and(f_0).

本文探讨了Ｖ形、梯形、半圆槽形和管形断面的换算摩擦系数ｆ与ｆ_０的关系。