vacuum

Test of affect moisture motion in soil boy by vacuum negative pressure;

真空负压对土体结构中水分运动影响试验探讨

The preparation of the hybrid fiber prefabricated tube part consisted of ZLl09 alloy base and Al_2O_3 fiber and short carbon fiber by extrusion casting and vacuum negative pressure reshaping method is investigated.

研究用真空负压整形法和挤压法制备ZLl09合金基氧化铝纤维与炭短纤维混杂纤维筒形预制件。

A clinical observation for the application of Hessburg-Barron vacuum trephine for the partial penetrating keratoplasty;

真空负压环钻在部分穿透性角膜移植术中的应用