蛋鸡舍侧立面小窗洞口设计原则:()
A.洞口下沿比舍内顶笼上沿低10()15cm,两侧均匀布置
B.洞口下沿比舍内顶笼上沿高10()15cm,两侧均匀布置
C.洞口下沿比舍内顶笼上沿水平,两侧均匀布置
D.洞口下沿比舍内顶笼上沿低10()15cm,两侧均匀布置
正确答案:B
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