Given the format:
Without more context (e.g., from a specific maintenance manual index), the exact completion can’t be determined, but the logical pattern is a hyphen or space separating the starting and ending section/page/chapter numbers. a1-f18ac-nfm-200 210
The most likely completion would be a range or variant: Given the format: Without more context (e
or a1-f18ac-nfm-200/210