国标矩形方管规格规格 规格 规格 规格 500X300X8.0--12.0mm 200X100X4.0--10.0mm 100X60X2.0--5.0mm 50X25X0.7--3.0mm 450X250X6.0--12.0mm 200X95X4.0--10.0mm 100X50X1.0--5.0mm 50X20X0.7--1.7mm 400X300X6.0--12.0mm 160X80X4.0--10.0mm 100X40X2.0--3.0mm 40X30X0.7--3.0mm 400X200X6.0--12.0mm 150X100X3.0--10.0mm 90X60X2.0--4.0mm 40X25X0.7--2.5mm 350X250X6.0--12.0mm 150X90X3.0--10.0mm 80X60X1.4--4.0mm 40X20X0.6--3.0mm 350X150X6.0--12.0mm 150X75X3.0--8.0mm 80X50X1.2--3.0mm 30X20X0.6--2.0mm 300X200X6.0--12.0mm 140X80X3.0--10.0mm 80X40X0.9--4.0mm 20X14X0.5--1.2mm 300X150X6.0--12.0mm 120X100X3.0--10.0mm 70X50X1.2--4.0mm 20X10X0.5--1.2mm 300X100X4.0--10.0mm 120X80X2.0--8.0mm 70X30X1.5--3.0mm 280X180X4.0--10.0mm 120X60X2.0--5.0mm 60X40X0.8--4.0mm 250X150X4.0--10.0mm 120X50X2.0--5.0mm 60X30X0.8--3.0mm 250X100X4.0--10.0mm 120X40X2.0--4.0mm 50X40X0.8--3.0mm 200X150X4.0--10.0mm 100X80X2.0--8.0mm 50X30X0.7--4.0mm