1. Pump에서의 Cavitation (공동현상) 에 대하여 기술하고 이로 생길 수 있는 문제점과 그 방지책에 대해 논하시오
- Cavitation이란
유체가 넓은 유로에서 좁을 곳으로 고속 유입하거나 벽면의 요철, 만곡부 등으로 흐름이 직선적이지 못할 때 유체는 저압이 되고 포화증기압보다 낮아지면 기화되어 기포가
destruction of excess weapons in exchange for development incentives
United Nations Register of Conventional Arms promotes trust and confidence through transparency. More than 90 member states report to the United Nations, other Governments, and to the people every year regarding their imports and exports of major weapons systems.
More than 95% of the trade in tanks, armoured vehicles, com
destruction of communities and the displacement of populations are just as much an issue for environmentalists as the damage war does to fragile ecosystems.
Last concern is depleted uranium (DU) projectiles. Depleted uranium is very dense and is used in projectiles designed to pierce armour, reinforced bunkers and other similar targets. Depleted uranium projectiles create fragments and dust, whi
Testing, Support Community trade, Activate Self Esteem, Defend Human Rights, and Protect Out Planet. Through this campaign, The Body Shop is the leading natural beauty product on the market.
Strengths
Stores on a large scale all over the world
Leading company in natural beauty products market
Eco-friendly image
Charisma of Anita Roddick
High