ha 专八

Gindudumara an oblast tikang ha syudad han Saint Petersburg nga gawas ha Leningrad Oblast.

与圣彼得堡不同，1991年后仍维名。

In the Shiting River rhombochasm,the geothermal system related to the faults may ha.

石亭江菱形断陷中可能形成了与断裂有关的地热系统,而浅层天然气可能沿断裂泄漏了。

Humic acid (HA ) was abstracted from leonardite,and a composite superabsorbent (HA PSA ) was prepared by compounding poly (acrylic acid ) and lignitic humic acid.

以风化褐煤为料制备腐植酸(HA),将HA与普通型保水剂(PSA)复合,获得HA型保水剂(HA-PSA)。