九一視頻黃片一區二區黃片,国产一级、无码视频,高清无码视频一区免费看,国产精品一区二区三免费视频播放

角鋼外表面積計算價格-國標角鋼長度與重量換算公式

b-邊寬；d-邊厚；r-內圓弧半徑
角鋼號數	尺  寸 （mm）			截面面積(cm2)	理論重量(kg/m)	外表面積(m2/m)
	b	d	r
2	20	3	3.5	1.132	0.889	0.078
		4		1.459	1.145	0.077
2.5	25	3		1.432	1.124	0.098
		4		1.859	1.459	0.097
3	30	3	4.5	1.749	1.373	0.117
		4		2.276	1.786	0.117
3.6	36	3		2.109	1.656	0.141
		4		2.756	2.163	0.141
		5		3.382	2.654	0.141
4	40	3	5	2.359	1.852	0.157
		4		3.086	2.422	0.157
		5		3.791	2.976	0.156
4.5	45	3	5	2.659	2.088	0.177
		4		3.486	2.736	0.177
		5		4.292	3.369	0.176
		6		5.076	3.985	0.176
5	50	3	5.5	2.971	2.332	0.197
		4		3.897	3.059	0.197
		5		4.803	3.770	0.196
		6		5.688	4.465	0.196
5.6	56	3	6	3.343	2.624	0.221
		4		4.390	3.446	0.220
		5		5.415	4.251	0.220
		8		8.367	6.568	0.219
6.3	63	4	7	4.978	3.907	0.248
		5		6.143	4.822	0.248
		6		7.288	5.721	0.247
		8		9.515	7.469	0.247
		10		11.657	9.151	0.246
7	70	4	8	5.570	4.372	0.275
		5		6.875	5.397	0.275
		6		8.160	6.406	0.275
		7		9.424	7.398	0.275
		8		10.677	8.373	0.274
(7.5)	75	5	9	7.367	5.818	0.295
		6		8.797	6.905	0.294
		7		10.160	7.976	0.294
		8		11.503	9.030	0.294
		10		14.126	11.089	0.293
8	80	5		7.912	6.211	0.315
		6		9.397	7.376	0.314
		7		10.860	8.525	0.314
		8		12.303	9.658	0.314
		10		15.126	11.874	0.313
9	90	6	10	10.637	8.350	0.354
		7		12.301	9.656	0.354
		8		13.944	10.946	0.353
		10		17.167	13.476	0.353
		12		20.306	15.940	0.352
10	100	6	12	11.932	9.366	0.393
		7		13.796	10.83	0.393
		8		15.638	12.276	0.393
		10		19.261	15.120	0.392
		12		22.800	17.898	0.391
		14		26.256	20.611	0.391
		16		29.627	23.257	0.390
11	110	7		15.196	11.928	0.433
		8		17.238	13.532	0.433
		10		21.261	16.690	0.432
		12		25.200	19.782	0.431
		14		29.056	22.809	0.431
12.5	125	8	14	19.750	15.504	0.492
		10		24.373	19.133	0.491
		12		28.912	22.696	0.491
		14		33.367	26.193	0.490
14	140	10		27.373	21.488	0.551
		12		32.512	25.522	0.551
		14		37.567	29.490	0.550
		16		42.539	33.393	0.549
16	160	10	16	31.502	24.729	0.630
		12		37.441	29.391	0.630
		14		43.296	33.987	0.629
		16		49.067	38.518	0.629
18	180	12		42.241	33.159	0.710
		14		48.806	38.383	0.709
		16		55.467	43.542	0.709
		18		61.955	48.634	0.708
20	200	14	18	54.642	42.894	0.788
		16		62.013	48.680	0.788
		18		69.301	54.401	0.787
		20		76.505	60.056	0.787
		24		90.661	71.168	0.785

結構用無縫鋼管重量表 
鑄鐵管重量表 
精密鋼管 
小口徑厚壁無縫管
冷拔無縫鋼管
厚壁無縫鋼管
大口徑無縫鋼管 
無縫鋼管
厚壁鋼管的價格