超音波法液位元元元元元元测定
ultra-sonic method of liquid meaduremert
超单元组合—超单元—单元划分
divition of “super unit combine—super unit—unit
成败型产品
pass-fail product
Success or failure product
成败型设备
Devices with only safe-or-failure pattern
成败型试验
Success-failure type test
success and failure test
单元成土过程
elementary soil processes
多柱塞型成型铸模
multi-plunger molding die
脉冲形成单元
Pulse forming line section