ester base meaning in English

矫基盐片基
酯基

Standard specification for ketone ethylene ester based sheet roofing
酮乙烯酯基薄板屋面材料标准规范
Phosphate ester based fluids for turbine lubrication , specification for
涡轮机润滑用磷酸盐酯基液体规范
Standard specification for phosphate ester based fluids for turbine lubrication
涡轮机润滑用磷酸酯基液体的标准规范
Processed photographic film for archival records - specifications for silver - gelatin type on cellulose ester base
档案记录用已冲洗摄影胶片.第1部分:纤维素酯基底上的银明胶型规范