... demand chosen(4) Bi-direction, or one direction permitted, one forbidden, or one direction charged, one for free, and all the working ... ) Beam can be lifted and fall when power is cut-off(11) The function with or without card-reading memory cab be set ... all the of life, With the torque motor to drive and reset, NO Attrition, Low–noise, Intelligence.3. Engineering Projects Access Control Turnstile Gate