污泥浓缩的目的在于缩小污泥的体积，以（）混凝剂的投加量与脱水设备。 减小。 增大。 保护。 维护。
Water allowed to accumulate in the hydraulic system oil will cause an oxidation process producing by- products which are normally （）. gums, acids, and varnishes。 removed by cellulose type filters。 neutralized by oil additives。 not removed by absorbent filter。
If the Shipowner makes an innocent misrepresentation which induces the Charterer to sign the contract，the Charterer may be entitled to（）the charter-party. rescind。 change。 alter。 amend。
何为泛水？试述卷材屋面泛水的基本做法？
简述锚头鱼蚤病的症状和病理变化。
污泥中的水分大致分为（）类。
