相交成直角

meet at right angles stability at large angles of inclination stability at small angles of inclination Angles at once right now lay the blame at the right door alternate angles butterfly angles pass from various angles right cross at right angles with shoot at right angles pressure at right angles second time at right angles to the first (指耙地) right angles for Doriot handpiece right angles for slip-joint connection pressure at right angle be cross at sth be at cross-purposes cross section at crown interval closed at the right tie up commencing at the right hand side