The industrial sewing machine with both top and bottom feeding system, which has not been made in our country yet, symbolizes the advanced world levels in the garment industry.
具有上下差动送料功能的工业平缝机国内至今还未试制成功。本文对其中具有代表性的日本DLU-490型机进行了分析与研究。
Biological hypotheses include ecological changes brought about by the evolution of cooperation between insects and flowering plants or of bottom-feeding predators in the oceans.
生物学上的假设包括生态变化，这些变化是由昆虫和开花植物之间的共同进化，或海洋中以海底生物为食的捕食者的进化所带来的。
When dolphins are feeding, that target is often a bottom-dwelling fish, though they also eat shrimp and squid.
宽吻海豚摄取食物时，其目标往往是在海底栖息的鱼类，但它们也吃虾和鱿鱼。
They often shelve it with bottom-feeding tabloids and the Racing Post.
因此经常被和垫底的小报与赛马邮报撂在一边。
The paper presents the internal structures and performance features of the fluidized bed opposed jet mill based on the jet nozzles structure, impeller types, feeding inlet and bottom structure.
通过分析对撞式流化床气流粉碎机的喷嘴结构、分级叶轮型式、加料口位置及底部结构等，阐述了该型气流粉碎机的结构型式及特点。
Fixed Belt or Roller conveyors can also be used as feeding or discharge devices at the bottom of the conveyor.
固定带和转动带也可以用于入货和卸货的装置。
The work principle and maintenance method of bottom gas-feeding brick in top-bottom duplicate blown converter are stated, it is proposed how to make the bricks synchronized with furnace life.
论述了顶底复吹转炉底部供气砖工作原理、维护方法，提出了如何操作才能使底部供气砖与炉龄同步的理论与具体措施。
To reduce the pollution of the oil-gas well towards the bottom after its fracturing and decrease the operation costs, the hanger specially used for annulus feeding fracturing was developed.
为了减轻油气井压裂后对地层的污染并降低作业成本，研制了高强度环空压裂专用悬挂器。
In this paper, the subject of study for the pet signs of automatic writing self-feeding system design from top to bottom.
本论文研究的题目为宠物标牌自助刻写机自动上下料系统设计。
The bottom of the copple is slanted downwards from one side of the reclaiming port to one side of the feeding port.
坩埚底部从取料口一侧向投料口一侧向下倾斜。
The bottom of the copple is slanted downwards from one side of the reclaiming port to one side of the feeding port.
坩埚底部从取料口一侧向投料口一侧向下倾斜。
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