Which ephone-dn type does the exhibit represent? ()
DN50中的DN表示()。
DN50中的DN表示()。
DN50中的DN表示()。
Refer to the exhibit. Which [ephone-dn type] would you expect to see in the partial show run output?()
公称直径DN>400的斜接弯头可增加中节数量,但其内侧的最小宽度不得小于()mm。
DN(Dg)表示(),PN(Pg)表示()。
Refer to the exhibit. Which ephone-dn type does Phone 10 represent?()
DN≥600mm卷制管,且在其内侧的焊缝根部进行封底焊。
dN/dt=rN(K-N/K)这一数学模型表示的种群增长情况是()