instructional

Excavate coal is primary production link in coal mine production, therefor, Weaving excavate coal working face supersedure plan has instructional meaning.

采煤是煤矿中的主环节,因而编制采煤工作面接替计划对煤矿具有指导性意义。

Conclusion: Prenatal diagnosis of fetal gastrointestinal tract anomalies is of instructional clinical value in eugenetics and postnatal treatments.

超声前诊断胎儿消化道畸形,对优、优育及出后早期及时治疗具有重临床指导价值。