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但我们能说，大约有两个安全打他们。
But we can say safely that there are about two dozen of them.
youdao
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安全锁能防止快速释放操纵杆完全打开。
The lock stops the quick release lever from opening fully.
youdao
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安全锁能防止快速释放操纵杆完全打开。
The lock stops the quick release lever from opening fully.
youdao