单词	general-use pneumatic--tube
释义	tube， general-use pneumatic通用气送管
随便看	operational amplifier--oa operational amplifier (opamp) operational amplifiers operational amplifiers {= opamps} operational amplifier，oa operational analysis operational and business support system operational and business support system {=obss} operational announcing system operational approach operational attributes operational audit operational auditing operational availability operational bypass operational calculus operational capability operational capability release operational category operational ceiling operational center operational chain of command operational character operational characteristic operational characteristic curve of turbine set