a little spacing tunnel

abrasive grit spacing

access spacing

adjacent picture carrier spacing

adjustment of lamellar spacing

air bubble spacing coefficient

air void spacing

air void spacing factor

allowable maximum spacing between movable supports

Anticollision spacing

appropriate spacing of pile

at equal spacing

atomic spacing

back-spacing

baffle spacing

bar spacing

bar spacing of grading panel

Basal spacing

beam-to-beam spacing

blade spacing