TP4 ferrite material and cores TP4材料及磁芯
Among 18 bacterial strains isolated from rotifer culture tank, one strain of Pseudomonas, TP4, a vitamin B12 producer, appeared a significant complementary effect on rotifer growth.
共18株细菌分离于轮虫培养池，其中，有一株产维生素b12的假单胞杆菌tp4对轮虫的生长繁殖有明显的促进作用。
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