Printed boards must be dried for a storage period of more than 3 months. The welding conditions are 120 ℃ for 3 hours.
3. Some types, such as the core trading engine of the exchange, control the trading process. If multiple types can be created, the system will be completely chaotic. (For example, if there are multiple commanders in an army who command at the same time, there will definitely be a mess), so only by using the singleton mode can the core transaction server independently control the whole process. The following is an analysis of some examples that we need to pay attention to when applying singleton pattern in the development process.
故事讲述十九世纪末期，正值日本明治维新，人心不安、时局动荡，绅士侦探结城新十郎（福士苍汰）在东京神乐坂崭露头角，曾到海外的他得到警视厅的信赖，成为特命侦探。维新英雄胜海舟的前剑术弟子泉山虎之介一直喜欢在困难的案件中进行推理，却总是被结城耍弄。明治版的福尔摩斯，就此展开了一系列曲折奇妙的推理冒险。
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