②→ The most __ developments in the mechanical world of watchmaking involve technology.
motor
noticeable 
notable

③→ Some watches use modern materials, including __ steel and sapphire crystal.

stale
stainless
stain

⑦→ Some watches have anthracite __.
coaching
coat
coating

⑧→ Fake watches exist to __ the desires of those who cannot afford real ones.
satisfying
satisfied
satisfy

⑨→ __ watches are only sold in authorized shops.

Authentic
Authenticity
Authorize

⑩→ All watches fall under __ protection and cannot be copied legally.
trades
trademark
tradesmen