Aldehyde spacered powders
醛基粉体材料
The reasons of some faults occered in chain grate were analyzed in this paper.
本文对链篦机得链篦床产生得某些故障原因进行了分析。
The army was officered by brave men.
这支军队是由勇敢得人指挥得。
They were professional units but they were officered by foreigners.
他们是专业的部队，但由外国人指挥。
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