Words to Describe ejectors

How ejectors often is described ("________ ejectors")

• such
• pneumatic
• secondary
• single
• intermittent
• automatic
• most
• several
• smoke
• steady
• small
• duplicate
• conventional
• main
• cylindrical
• calibrating
• liquid
• auxiliary
• mechanical
• apical
• low
• disposable
• portable
• multistage
• stage
• supersonic
• typical
• operated
• actuated
• poor
• special
• hydraulic
• left
• individual
• multiple