parallel plain crystal gauge

plain calliper gauge

plain snap gauge

taper plain plug gauge

Jianghan Plain and Dongting Lake Plain

Bayard-Alpert ionization gauge (B-A gauge)

Brown and Sharpe wire gauge {= B&S wire gauge}

track gauge level gauge

a plain

abbreviated plain address

Abdominal plain films

abrasion plain

abyssal plain

aeolian plain

aggradated plain

aggradation plain

aggradational plain

aggregation plain

aircraft spherical plain bearing