单项选择题

A.密封→注水→检漏→分油→间断排水或排渣
B.间断排水或排渣→密封→注水→分油→检漏
C.密封→注水→间断排水或排渣→检漏→分油
D.检漏→密封→注水→分油→间断排水或排渣