“C-O”可以造什么句，C-O造句

In the closed position of the circuit-breaker, the opening and closing spring are in charged state. This means the circuit-breaker is in a position to perform O-C-O switching sequences.

Study on Process and Mechanism of Ion N-C-O Multielements Penetration in an Atmosphere of Air and Organic Liquid;

The simple sugars monosaccharides0 are basically aliphatic polyhydroxy aldehydes and ketones: HOCH2 - CHOH n-CHO and HOCH2 - CHOOH n-1-C-O-Ch2OH, called "aldoses" and "ketoses," respectively.