Half of (telephone land lines) can be inoperable.Logical formLearned from1 sentences. A (sound system) can be inoperable.Logical formLearned from1 sentences. (Trailer brakes) can be inoperable.Logical formLearned from1 sentences. Parts of a system can be inoperable.Logical formLearned from1 sentences. A bleed can be inoperable.Logical formLearned from1 sentences. A (brake warning device) can be inoperable.Logical formLearned from1 sentences. (Screening machines) can be inoperable.Logical formLearned from1 sentences. A winch can be inoperable.Logical formLearned from1 sentences. A number of machines can be inoperable.Logical formLearned from1 sentences. (Emergency workers) can be inoperable.Logical formLearned from1 sentences. Toilets can be inoperable.Logical formLearned from1 sentences. A (water system) may remain inoperable in some areas.Logical formLearned from1 sentences. (Sewage treatment systems) can be inoperable.Logical formLearned from1 sentences. A gyroscope can be inoperable.Logical formLearned from1 sentences. (Power windows) can be inoperable.Logical formLearned from1 sentences.