Changing flat roof to slope roof
diagonal ridge for hip roof，vertical ridge for gable roof
flat- roof-to- slope-roof
flat-roof-to-slope-roof
flat-roof-to-sloping roof
roof pressure roof weight
roof prism (=roof-angle prism)
a swing around the circle
ADAPTING TO POWER SWING
aluminium alloy door in swing type
ammunition swing devices
Amplitude of horizontal swing
angle of horizontal swing