70型M10龙骨
单面21型钢 t=1.5mm-2.0mm
单面41型钢 t=2.00mm-2.5mm
单面52型钢 t=2.5mm
单面62型钢 2.5mm-2.75mm
单面76型钢 2.75mm
单面82型钢 2.75mm
双拼21D型钢 t=1.5mm 2.0mm
双拼41D型钢 t=2.0mm 2.5mm
双拼52D型钢 t=2.5mm
双拼62D型钢 t=2.5mm-2.75mm
双拼760D型钢 2.75mm