Absolutely, mm > cm all the way. Other than you putting s at the end of mm, we don’t take the Lord’s (metric) name in vain around here.
I do feel kind of sorry for East Asia though, since their languages seperate at intervals of 10⁴, rather than 10³. The giga and mega prefixes just make no sense there. 1 GW = 10,0000,0000 W and 1 MW = 100,0000.
Language strikes again
Not sure, but perhaps they would prefer a prefix of 10-4 rather than mm (10-3).
HCl is already in your stomach, what’s the big deal of a little in the lungs?!?