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To keep track of records, the Maya used astronomy.
The Sumerians used a writing system called cuneiform to keep records..
Disposable refrigerant containers are only used for virgin refrigerant.
It is R134a. Please under NO circumstances use the refrigerant that has stop leak added. If you have to take it to a repair shop and need repairs, it will ruin the equipment that is used to recover the refrigerant. Also, you need to be exact in the amount that is in the system. There should be a sticker under the hood with all of the information on it.
Refrigerant are used in refrigerator for cooling and dehumidifying indoor air.
the incas used the quipus to keep records
the incas used the quipus to keep records
134a refrigerant
The oil used to lubricate the compressor is cycled with the refrigerant.
They were illiterate but they used the runic alphabet to keep records
They help to keep good records of measurements and observations.
R-134 freon is the GAS used. You also need to add a lubricating oil, known as PAG100 (Polyalkelene Glycol). This is a special oil, which also helps form a seal around the compressor, to keep the refrigerant gas in.