the first creep stage when the strain rate (and creep rate) decrease with time (see: creep, creep rate, strain rate; compare: secondary creep, tertiary creep), roome esimene staadium mida iseloomustab moonekiiruse (ja roomekiiruse) vähenemine ajas (vt roome, roomekiirus, moonekiirus; vrd sekundaarroome, tertsiaarroome)