guid - hear
- hard negative
- hard rays
- hard sinter
- hard solder
- hard spelter
- hard spots
- hard steel
- hard surfacing
- hard tap
- hard taphole
- hard temper
- hard tube
- hard xeroradiography
- hard-burnt brick
- hard-drawn
- hard-drawn copper
- hard-drawn tube
- hard-driven furnace
- hard-facing deposit
- hard-facing electrode
- hard-grained
- hard-magnetic
- hard-magnetic alloy
- hard-magnetic material
- hard-metal industry
- hard-metal products
- hard-rolled
- hard-setting
- hard-sintering dolomite
- hard-soldered
- hard-surfacing electrode
- hard-textured filter paper
- hard-to-reach
- hard-to-remove slag
- hard-to-weld
- hard-wearing surface
- hard-wrought
- harden
- harden right out
- harden throughout