When under maneouvring conditions with the machinery being manually operated the control u

Under manoeuvring condition the main engine may run on _____.

Under some conditions, a single bacterium can grow seventeen million disease－carrying

Under normal conditions, the quantity of air circulation becomes less and lessWhat is the

听力原文： Under normal conditions the act of communication requires the presence of at lea

Under what conditions should the bypass operation be performed？A．When a general practition

With reference to operating a four－ram steering gear system under emergency conditions, wh