0
Soochu Posted 22 years ago
Grammar
The differences among supply source, the Mains and SUPPLY APPARATUS.
The apparatus are fed from a supply source other than the MAINS or from a SUPPLY APPARATUS, and which contain a LASER SYSTEM or produce an internal OPERATING VOLTAGE greater than 4000 V (peak), this standard applies as far as applicable.
The above words is from Standard UL6500 of US.. I can't catch the differences among " a supply source", " the MAINS" and " a SUPPLY APPRATUS".
I know the MAINS is fed from Electric Power Department of US.. It's the 110V in US.
BTW, can I use the word "catch" instead of "understand"? ^_^
The above words is from Standard UL6500 of US.. I can't catch the differences among " a supply source", " the MAINS" and " a SUPPLY APPRATUS".
I know the MAINS is fed from Electric Power Department of US.. It's the 110V in US.
BTW, can I use the word "catch" instead of "understand"? ^_^
Get the Weekly English Kit 📬
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.
0 Answers
Related Questions