On the Classification and Evolution of Gastropod Opercula Fossils;
腹足类口盖化石分类与演化探讨
The structure characteristics of inverse jaw bottle lid were analyzed, and the design point and work procedure of injection mould for inverse lid were introduced.
分析反口盖的结构特点,介绍反口盖注射成型模具设计的要点及模具的工作过程。
Study on fatigue life of hatch covers in large container ships;
大型集装箱船舱口盖疲劳寿命研究
Finite element strength analysis is carried out on the tween deck and its hatch cover of No.
2舱二层甲板及其舱口盖进行有限元强度分析,最后得到结构的许用载荷值,并与船舶所有人提供的原始值进行比较。
The writer of the article offers a proposal for building main deck hatch cover drive of the 2300 t cargo vessel, briefs its operational principle and design features.
本文介绍了 2 30 0吨杂货海船的主甲板舱口盖传动的研制方案 ,简略说明其工程原理和设计特点 ,为 5 0 0 0吨等其他大吨位杂货海船主甲板舱口盖传动或控制系统的研制及今后的改进提供参考。
In this paper technological analysis is made on fuel filler lid design.
对加油口盖零件设计进行工艺分析 ,从节约及加工简便考虑 ,在不影响产品性能、外观及装配关系的前提下 ,提出了一种对于翻边小、成形时大部分悬空制件的模具设计方
The cover for such an opening.
舱口盖覆盖这种开口的盖子
stick down(the flap of)an envelope
粘住信封（的口盖）.
hydrautorque-hinge hatchcover
液压扭转铰链舱口盖
hydrauliccontrol device for hatch cover
舱口盖液压控制装置
oil cooler access cover
通机油散热器的舱口盖
balanlift type hatchcover
平衡式移滚型舱口盖
double-skin pontoon hatchcover
底面铺板箱形舱口盖
Remove the mouthpiece cover by gently squeezing the sides of the cover and check the mouthpiece inside and outside to see that it is clean.
轻轻挤压吸口盖的两侧，移除吸口盖。检查吸口内外是否乾净。
an entrance equipped with a hatch; especially a passageway between decks of a ship.
盖有舱口盖的一个入口；多指一条船的甲板之间的出入口。
After use always replace the mouthpiece cover to keep out dust and fluff.
使用后请将吸口盖盖上，以防灰尘和绒毛。
Two more footrests and handgrips should be installed at the entrance of the small hatchcover.
在小舱口盖的进口处再安装两只踏步和拉手。
GASTROPOD OPERCULA FROM THE PALAEOGENE XINHEKOU FORMATION OF DONGTING BASIN, HUNAN
洞庭盆地下第三系新河口组腹足类口盖化石
tuck the flap of an envelope in
把信封的口盖摺进信封里.
I cover the top with a piece of cardboard.
我用一张纸板把罐子的口盖上。
The round flat cover over the hole on a wood-burning stove.
炉盖一种圆形的扁平盖，盖在烧木头的炉口上
put rocks over a cave entrance
把岩石盖在洞的入口处
big opening easy open lid production line
大开口易拉盖生产线
gum down the flap of an envelope
用胶粘住信封的盖口