freon 12造句

• Otherwise, a newer type of freon can be used, but it's more expensive than freon 12.
• Freon 12 isn't being banned, but it won't be produced or imported after a certain date.
• However, I had to purchase the Freon 12 on Saturday and make up the first aerosol on Sunday in my chemical laboratory in Beltsville.
• A : All the law does is ban production of environmentally harmful freon 12 after Jan . 1, 1996, said Pam Adams at the U . S . Environmental Protection Agency.
• Although freon 22 doesn't deplete the ozone layer as quickly as freon 12, it also is being phased out, but on a slower schedule ( from Jan . 1, 2003, to Jan . 1, 2030, again depending on the substances ).
• A : There are many kinds of freon, including freon 12 ( also called R12 ), the type used in car air conditioners, and freon 22 ( R22 ), which is used in homes and buildings, a spokesman for the Environmental Protection Agency said.