You might assume this pattern is inherent to streaming. It isn't. The reader acquisition, the lock management, and the { value, done } protocol are all just design choices, not requirements. They are artifacts of how and when the Web streams spec was written. Async iteration exists precisely to handle sequences that arrive over time, but async iteration did not yet exist when the streams specification was written. The complexity here is pure API overhead, not fundamental necessity.
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无纺布一次性内裤可以依靠黏合或超声波工艺实现自动化，因为它几乎不存在板型问题。但纯棉内裤不同，它必须通过缝纫和皮筋结构来实现贴合度与舒适度，这意味着要完成六道以上的精细缝制流程。而纯棉面料的柔软和弹性，恰恰是自动化设备最大的敌人。机器推进中极易产生褶皱，一旦失稳，整条产线便无法继续。，推荐阅读Line官方版本下载获取更多信息
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