The following table is based on the guidelines of ASTM D 2855, "Standard Practice for Making Solvent-Cemented Joints with Poly Vinyl Chloride (PVC) Pipe and Fittings".
下表以美国材料实验协会ASTM D 2855“聚氯乙烯（PVC）管道和管件液状粘固剂连接标准规程”有关标准制定。
2
Starting from d, Llactic acid and glycolic acid, biodegradable drug delivery material poly (lactic acid-glycolic acid) (PLGA) was directly synthesized via melt polycondensation.
以d, l乳酸、乙醇酸为原料，通过熔融聚合法直接合成生物降解材料聚乳酸乙醇酸(PLGA)。
3
The encapsulation efficiency and drug loading of triptolide-loaded poly (d, L-lactic acid) nanoparticles were analyzed by RP-HPLC and ultracentrifuge method in this study.