头开关 meaning in Chinese

able salt
tab assembly
tabernacle work
table area
table balance
table band saw
table base
table chair
table cloth
table control device
table fan
table feeder
table flap
table joint
table knoll
table look up
table lookup instruction
table man
table money
table mountain
table of altitudes
table of compound interest
table of integrals
table of limits
table of random numbers
table of rates
table planing machine
table reef
table runner
table saddle
table settle
table shore
table slate
table standard
table stop
table tap
table tennis court
table type jack
table vibrator
table viewer
table ware
tabled fish plate
tabled joint
tabled scarf
truck loading