Oil base annulus protection fluid is not corrosive, however, its high cost and environment pollution restricts its universal use.
油基环空保护液是非腐蚀性的，但单位成本高、环境污染严重，不能广泛应用。
Oil base annulus protection fluid is not corrosive, however, its high cost and environment pollution restricts its universal use.
油基环空保护液是非腐蚀性的，但单位成本高、环境污染严重，不能广泛应用。
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