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英寸和厘米的换算
DN管和英寸钢管壁厚换算表
公称通径 A系列 B系列 al Pipe Size D Series A Series B 15 21.3 18 1.6 2.1 2.6 --- --- --- --- 2.9 --- --- 3.6 --- --- --- 4.5 20 26.9 25 1.6 2.1 2.6 --- --- --- --- 2.9 --- --- 4 --- --- --- 5.6 25 33.7 32 1.6 2.8 3.2 --- --- --- --- 3.2 --- --- 4.5 --- --- --- 6.3 32 42.4 38 1.6 28 3.2 --- --- --- --- 3.6 --- --- 5 --- --- --- 6.3 40 48.3 45 1.6 2.8 3.2 --- --- --- --- 3.6 --- --- 5 --- --- --- 7.1 50 60.
120英寸和150英寸电动投影幕,4比3
120寸电动投影幕布宽 2.44*高 1.83m，幕布比例： 4:3 150寸电动投影幕布宽 3*高 2.3m，幕布比例： 4:3 宽屏 16:9 的 150 寸投影幕 实际有效尺寸为 3.32 米 *1.87 米 祝你好运