英和和英

an unsealed letter

open the lock of

a hinged door

unlock the door

an open door

to turn off a switch

slide a drawer out

open cover

open the door

an open window

a hinged door

open the gate

to open a fan

two-way switch

to open (something) completely

an open ticket

the switchgear for the shutter

a knob on a door

turn on a cock

the breech-operating mechanism

to open the curtain―raise the curtain―draw （back） the curtain

reeve an opening

unbolt the door

open the zipper of

to open and shut

to open a door

turn a key

an open port

to open a drawer

to open a drawer