acceptable ring groove tool

Internal ring groove nut

piston ring groove

Ring Groove

ring-ring-section

kind of top hollow and top full

Top Roof and Top Coal

two adjacent edges simply supported and the other two adjacent edges clamped

two and two cheek

two and two rib stitch

two and two twill

Two Returns and Two Having

Two-by-Two

two - component two - phase flow

the Western Ring Road Sector of Central Ring Road

100 t Top and Bottom Combined Blown Converter

3-parallel bunker bell-less top

a knot of hair on top of head

able-top

above top floor and underground position