fusion pcb "notes"

Seeed Services Fusion PCB/ PCBA Services
#1

hi, I was looking at this notes about the service… and I can’t understand what they mean… for example:

minimum line: 6mil
minimum space: 6mil

what means minimun line? is it the minimum diammeter of the traces we using? and 6mil means 6mm or 6 in/1000 (according to wikipedia)?

is minimum space the minimum “size of the grid”?

thx

#2

minimum line: 6mil means minimum trace width is 6/1000 inch.
minimum space: 6mil means minimum trace/pad/dril to trace/pad/drill distance is 6/1000 inch.

Thanks
Albert