Words to Describe seatings

How seatings often is described ("________ seatings")

• single
• tapered
• firmer
• spherical
• several
• dinner
• flat
• renewable
• open
• relative
• fixed
• respective
• machined
• double
• circular
• metal
• separate
• hemispherical
• nightly
• boiler
• conical
• faced
• special
• early
• valve
• soft