1. 용접의 개념
금속과 금속을 충분히 접근시키면 이들 사이에는 뉴튼의 만유인력에 따라 금속 원자간에 인력이 작용하여 서로 결합하게 된다. 이 결합을 이루려면 원자들을 10nm정도 접근시켜야 하는데 이와 같은 일은 평상시에는 일어나지 않는다. 그 이유는 보통조건에서는 금속표면에 산화막이 존
cutter.
What future can she have?
He cuts meat!
- You plough snow.
- At least meat you can eat.
- Why is he here?
- Hes an employee.
All right. Im outta here.
Ill see you at home.
- Dont go by Jans.
- Im not.
- Hey.
- You sand my lots?
- Yeah. Dont go by there.
- Im not. Just get my lots.
- Hes going by there.
- Without a doubt.
- Do I got anything in my stache?
- Youre clean.
Willie!
- Willie!
Grit chamber
Definition
Remove the grit and inorganic matter over 0.2mm in waste water
[ Function ]
Prevent abrasiona and damage of machine equipment
Prevent Piping system blockage
Prevent adverse effect by deposits
Gravity type chamber
Using the gravity and velocity of waste water
Take the deposits to sludge facility, using sand pump
Aeration type chamber
Using centri
2000 B.C - The first recorded (The Susruta Samhita, Sanskrit writing) water purification began with the Egyptians. It is said that impure water should be boiled over a fire, heated in the sun, have a hot iron dipped into it or purified by filtration through sand and course gravel.
A major step in the development of desalination technologies came in the 1940s during World War II when various m
<거푸집의 요구성능>
1. 변형,파열,도괴하지 않도록 충분한 강성 및 강도가 요구된다
2. 수밀성이 요구된다.
3. 전용을 그다지 생각안하는 경우엔 가공성이 용이하고 신속하게 조립되는 재료가 요구된다.
4. 콘크리트 표면미관이 요구되는 경우엔 거푸집널의 재료에 의해 콘크리트 표면상태가 좌우된