According to cic, you must "have at least one year of continuous full-time (or an equal amount in continuous part-time) paid work experience within the last ten years in the primary occupation you state in your application."
Your work experience must be:
at least one year (1560 hours), full-time or an equal amount in part-time,
paid work (volunteer work, unpaid internships, etc. do not count),
in the same occupation, and
within the last 10 years,
at skill type 0, or skill levels A or B of the 2011 edition of the Canadian National Occupational Classification (NOC)
Your experience just needs to be in the NOC category. No matter which country you got it. That's the point of FSW, to get skilled workers from outside Canada. For Canadian experience, they have the CEC.