abbr. 美国摄影协会（Photographic Society of America ）；美国诗社（Poetry Society of America）；公共事业管理（Public Service Administration ）；公用事业协会（Public Service Association）
1.Granite as raw material,PSA is made in a series of aggregat e reactions of chemical fusibility.
选用花岗闪长岩为原料，通过一系列的化学熔融应制新型--硅酸铁铝盐。
2.The mucin is positie for mucicarmine, PAS, and alcian blue.The glands are negatie for PSA and PAP.
粘蛋白胭脂红染色、PAS染色和阿辛蓝染色阳性，免疫组化PSA和PAP染色阴性。
3.Humic acid (HA ) was abstracted from leonardite,and a composite superabsorbent (HA PSA ) was prepared by compounding poly (acrylic acid ) and lignitic humic acid.
应制
新型
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，部分未经过人工审核，其表达内容亦不代表本软件的观点；若发现问题，欢迎向我们指正。
