Open cell aluminum foams were prepared by traditional powder metallurgy process, with spherical carbamide particles as the space-holder.
以球形尿素颗粒为造孔剂，采用传统的粉末冶金工艺制备开孔泡沫铝并研究了其性能。
Open cell aluminum foams were prepared by traditional powder metallurgy process, with spherical carbamide particles as the space-holder. The properties of open cell aluminum foams were studied.
以球形尿素颗粒为造孔剂，采用传统的粉末冶金工艺制备开孔泡沫铝并研究了其性能。
American astronaut Jeff Williams became the U. s. record-holder for most time spent in orbit after this mission brought him up to 534 days spent in space across four separate missions.
美国宇航员杰夫·威廉姆斯成了美国在轨道内最长时间纪录的保持者——算上这次任务，他一共参加了四次不同的任务，在太空中待了534天。
The reflecting element is arranged on the lamp holder, forms an accommodating space and provided with at least one open pore.
一反射元件，设置于该灯座并形成一容置空间，该反射元件具有至少一开孔；
Both side big hanger holder design, height and direction can be freely adjusted according to use space, convenient for hanging different length clothes.
两侧大挂钩设计，根据使用空间，可以自由调整高度和方向，方便悬挂各式长短衣服；
The invention relates to a projection-type head lamp capable of reinforcing light in a dark space, which comprises a lamp holder, an illuminating part, a shading plate and a light guide plate.
一种可补强暗区光线的投射式头灯，包含：一灯座、一发光件、一遮光板，以及一导光板。
The invention relates to a projection-type head lamp capable of reinforcing light in a dark space, which comprises a lamp holder, an illuminating part, a shading plate and a light guide plate.
一种可补强暗区光线的投射式头灯，包含：一灯座、一发光件、一遮光板，以及一导光板。
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