Arch dams have been built since ancient times, but never on such a massive scale.
从古早就已经有人建造拱坝，但从来没有这么大的规模。
Arch dam
原声例句
双语版 TED-Ed 演讲精选
英语百科
Arch dam
An arch dam is a solid dam made of concrete that is curved upstream in plan. The arch dam is designed so that the force of the water against it, known as hydrostatic pressure, presses against the arch, compressing and strengthening the structure as it pushes into its foundation or abutments. An arch dam is most suitable for narrow gorges or canyons with steep walls of stable rock to support the structure and stresses. Since they are thinner than any other dam type, they require much less construction material, making them economical and practical in remote areas.
- headgear headphone的意思
- head gear height的意思
- headgear height的意思
- headgear mandibular的意思
- Headgear,Orthodontic的意思
- headgear pulley的意思
- headgear receiver的意思
- headgear的意思
- headgear safety catches的意思
- headgear sheave的意思
- Headgears,Orthodontic的意思
- head generating spirit的意思
- head geometry的意思
- head germ的意思
- Head Girl的意思
- head girls的意思
- head grit的意思
- headgrit的意思
- head groom的意思
- head groove的意思
- headground的意思
- headgrounds的意思
- head group的意思
- headgroup的意思
- headgroups的意思