The differences between high pressure spray, low pressure spray and high pressurepouring equipment for rigid polyurethane foam are simply introduced.
对用于硬质聚氨酯泡沫塑料的高、低压喷涂设备及高压灌注设备作了简单的比较和介绍。
2
The cause for leaking in tunnels and application of high pressurepouring machine in Shanghai Subway line2a re intro-duced. And comparison between old and new construction methods is made.
介绍了隧道漏水成因,以及高压灌机在上海地铁明珠二号线堵漏工程中的应用情况和新旧工法的对比。
3
Pouring out troubles to friends is a good way of easing off pressure.