Words to Describe countershaft

How countershaft often is described ("________ countershaft")

• intermediate
• regular
• secondary
• upright
• single
• pulley
• same
• lower
• vertical
• differential
• common
• small
• speed
• main
• variable
• triple
• second
• usual
• short
• front
• driven
• separate
• horizontal
• overhead
• independent
• complete
• special
• plain