The actual application of the GBF pipe in the engineering makes it get important breakthrough and revolution in the design of the floor.
通过在工程中的实际应用，使得GBF管在楼盖设计中有了重大突破与变革。
2
Objective: To study the relation between gingival blood flow (GBF), blood current velocity (BCV), blood concentration (BC) in gingival and periodontal diseases.