TiN base hard film

Hard Roof and Hard Coal

Hard Roof and Hard Floor

hard-soft-hard sandwich media

Geological Team of Datun Tin Mine of Yunnan Tin Group

Tin and Tin Alloy

tin and tin-lead alloy electroplating

tin oxides and tin hydrooxides

tin(II) dihydrogenphosphate; tin(II) dihydrogen ortho-phosphate

tin-based tin-antimony-copper alloy

(semi) hard process

20 m VERY THICK AND MEDIUM HARD SEAM

3 channels hard cholecystoscope

A Good Man Is Hard to Find

a hard case

a hard nut to crack

a hard row to hoe

a hard sphere unit

ABCD optical system with internal hard-edge aperture