【化】 external mechanical seal
besides; in addition; not closely related; other; outer; outside; unofficial
【医】 ec-; ecto-; exo-; extra-; xeno-
act; dress up; install; load; pretend
ceremony; formula; model; pattern; ritual; style; type
【化】 expression
【医】 F.; feature; formula; Ty.; type
【化】 contact seal; mechanical seal
