a block是什么意思

用法例句

The stabilization model about the hollow block placed on the rubble foundation is investigated in the wave flume under regular wave s action.

通过二维物理模型试验,探讨了暗基床上空心块体在规则波作用下的失稳模式。

It briefly introduces the general situations of design and essential s of construction for the large bottomless hollow block structures at Nanyou Cem ent ＆Building Materials Wharf.

简要介绍大型无底空心块体结构在南油水泥建材码头中的设计概况和施工技术要点 。

Bone Transplantation for Fracture of Lumbar and Thoracic Vertebrae Through Hollow Bone-planting Appliance;

经椎弓根空心椎体植骨器的设计与临床应用

Construction technology of hollow and high pier of railway bridge;

铁路桥梁空心高墩施工技术

The preparation and application of hollow core-shell structured nanomaterials were introduced in this article.

本文对空心核壳结构纳米粒子的制备研究及应用进行了综述。