Two correlations have been raised and sustained by observational values, which are precession period - absolute magnitude correlation and black hole mass - precession cone semi-angle correlation;
提出两个关系，即进动周期—绝对星等的关系和黑洞质量—进动锥角的关系；
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Today I have a slightly more powerful model – the Absolute 1000W which promises a semi-modular design, low noise output and stable rails.