Step 2 of the large-variety workflow performs two tasks (extracts a list of items from the production order and fetches process details for each item).
多种工作流程的第2步执行两个任务(从生产指令中提取需要生产的产品清单并获取每一个所需产品的流程细节)。
Listing 9 shows the general structure of the controller and focuses on the initialize method and the two tasks it performs.
清单9显示了控制器的总体结构，重点放在initialize方法及其执行的如下两个任务。
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