单词：delivery head
delivery head的用法和样例：
例句
- The head distribution is different in the two layers.两层中的水头分布不同。
- The critical velocity and the head loss gradient of slurry pipelines are important design parameters.临界速度和水头损失坡降是浆体输送管道的重要设计参数。
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Jean opened her mailbox. She saw the postal form. It said, Insured package. Sorry we missed you. Call for redelivery: 1-800-275-8777. She went upstairs to her apartment. She called the 800 number. A phone menu voice said, Thank you for calling USPS.
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The USPS phone menu voice answered. Jean said, Representative. A male representative said hello. The mailman didn't redeliver my package today, Jean said. What is the tracking number for your package? he asked. Jean told him the number. I can't find
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