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(입트영) What exactly is hydrofluoric acid.....13.4.11

What exactly is hydrofluoric acid
About seven months ago, a huge amount of hydrofluoric acid leaked from a chemical plant in Gumi. This horrific leak claimed the lives of five coworkers and injured at least 18 others. More than 3,000 local residents had to be treated or nausea and other ailments. Hydrofluoric acid is highly corrosive and can dissolve glass and stainless steel. Exposure to this toxic chemical can cause burns to the lungs, bones, and nervous system. Hydrofluoric acid is used to make refrigerants, drugs, plastics and aluminum. It is also used to remove the oxides in silicon surfaces.

Pattern Practice
You need to close the lid tightly so it doesn’t leak
A crucial piece of information was leaked to our competitors
I think your right front tire is leaking air

A massive tsunami claimed more than 15,000 lives
The Korean War claimed the lives of more than 2.5million Koreans.
The earthquake claimed tens of thousands of people’s lives

He was taken to hospital and treated for minor injuries
Autistic children are usually treated with behavior therapy
He was treated for burn to his skin

Make sure you dissolve sugar in water completely
Take this tablet and let it dissolve in hot or cold water

What is your permanent address?
Staring at these LED lights may cause permanent damage to your eyes
She got her permanent makeup done the other day.

Cookies are used to store your information on your computer
Cilantro is used to add flavor to soups and salads

expression of the Day
Did you hear? There was another gas leak!
Really? What happened this time?
It was caused by a human error
They really need to be careful with that stuff