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全压起动：电动机在额定电压下起动称为全压起动，又称__________________
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直接启动适用于：______________________________________.
1.The familiarity with HTML and CSS orthe ability to realize the special difficultiesfaced by users.
The purpose of validating the codes is to reduce possible problems the invalidcode causes.
The automated accessibility testing can find many problems which could easily bemissed by reading the code.
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