A、正确
B、错误
答案:A
A. 正确
B. 错误
A. 适用于直角配管
B. 适用于高粘度的场合
C. 较好的自洁性能
D. 流向一般为侧进底出
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A. 亮
B. 灭
C. 常亮红
D. 常亮绿
A. 正确
B. 错误
A. 2个
B. 3个
C. 1个
D. 4个
A. 正确
B. 错误
A. 正确
B. 错误
A. 正确
B. 错误
A. 含有少量悬浮物
B. 腐蚀性
C. 高压差
D. 泄漏等级高