正确答案: D
Ⅰ+Ⅲ+Ⅳ+Ⅴ
题目:填料函式密封装置具有()等优点。Ⅰ.结构简单;Ⅱ.价格低廉;Ⅲ.工作较可靠;Ⅳ.维护管理方便;Ⅴ.易于检修。
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学习资料的答案和解析:
[单选题]合成材料艉轴承中以()艉轴承应用日益增多。
赛龙
[单选题]Improper maintenance of an automatic auxiliary boiler oil burner could result in ().
decreased boiler efficiency
[单选题]Auxiliary boilers are divided into several classifications, one of which is ().
water-tube forced circulation