right-angled bends直角弯头
right-angled guide直角导纱针
right-angled screwdriver直角改锥
right-angled plane二维直角平面
right-angled trapezium直角梯形
right-angled error正交误差
right-angled turn直角转弯
right-angled triangle[数] 直角三角形
Right-Angled and直角和
ADJ（形容词） A right-angled bend is a sharp bend that turns through approximately ninety degrees. 大致成直角的 [ADJ n]
ADJ（形容词） [ADJ n] →see right-angled triangle