Through orthogonal experiment, laser power, scanning rate and gas flow were optimized and pretreatment techniques were adopted to cancel pore and crack in laser weld of LY12CZ.
为消除LY 12 CZ铝合金激光焊接时焊缝中常见的气孔和裂纹缺陷，通过正交实验，优化了激光功率、扫描速度、保护气体流量等工艺参数，并采取适当的焊前预处理工艺。
After undergoing flashing and expansion on a solid-particle pore diameter expansion device limestone particles were investigated for their desulfurization performance on a gas-flow reactor.
将在固体颗粒孔径增扩仪上进行孔径闪蒸增扩后的石灰石颗粒，在气流反应器上进行了脱硫试验研究。
Methods of experiment, theory and calculation were used to establish a new nonlinear flow law. Experiment results of gas flow in low permeability pore-fissure media were analyzed.
采用实验、理论与计算相结合的方法建立低渗透孔隙-裂隙介质气体非线性渗流运动方程。
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