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Legal services
The services involving law-related matters such as the issuing of legal opinion,filing and pleading, as well as the issuing and defending of law suits among many others.
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鈣
Chemistry; General chemistry
化學元素符號 Ca 和原子數 20。它有 40 的原子品質的 。078 amu。鈣是一種軟灰色的鹼土金屬，和是大眾在地殼中的第五最豐富的元素。
