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乐山师范学院专业英语 B卷
液压系统
低碳钢
自动上料装置
曲轴销孔
批量生产
The production of aluminum is second only to that of iron and steel.
Even metal plates(金属板材)can be pierced through by laser beam(激光束).
Mold(铸型)halves are mated and prepared for pouring metal.
Either a shaft-basis system or a hole-basis system may be used.
Dimension is an involved subject and long experience is required for its mastery(掌握).
An analytic design method for a lossy gain-compensating network is presented and the advantages of Lossy networks are discussed. Examples of two-stage Amplifiers using FETs and bipolar transistors are Presented to show the feasibility of this particular network in low power Amplifier designs.
The process of the clutch(离合器)engagement(接合,啮合) when starting the automobile is introduced. The influencing factors of clutch engagement are discussed. The regular model of clutch engagement and the five – freedom dynamics model of the tow wheels of the bus are established.
A broaching line which produces a completely broached (linking) rod and cap every 12 seconds comprises two linked standard Cincinnati (company name辛辛那提) chain broachers, one a 30 by 114 and the other a 30 by 120 machine, with specially designed automatic loaders, locating devices and work transfer equipment.
But in factories and all other places where radioactive materials are used, great care must be taken to prevent anyone form being injured by coming too close to a strong radioactive source or by breathing the radioactive dust, for the rays form radioactive substances can be very dangerous.。
One no-bake approach, called the shell core process, is similar in principle to the shell molding process. Like shell molding, shell coring produces a hard, smooth and accurate surface. Sand, containing a thermosetting resin, is blown into a heated corebox. After a brief curing period, any loose, uncured sand is dumped out. The resulting shell core is hollow. Thickness of the core depends on the curing time: the longer the cure, the thicker the shell. Because the core is cured in the corebox, driers used in the oven-baking process are unnecessary. For shell coremaking, the corebox must be heated to 400—500°F. Hence the corebox must be made of metal.
低碳钢
自动上料装置
曲轴销孔
批量生产
The production of aluminum is second only to that of iron and steel.
Even metal plates(金属板材)can be pierced through by laser beam(激光束).
Mold(铸型)halves are mated and prepared for pouring metal.
Either a shaft-basis system or a hole-basis system may be used.
Dimension is an involved subject and long experience is required for its mastery(掌握).
An analytic design method for a lossy gain-compensating network is presented and the advantages of Lossy networks are discussed. Examples of two-stage Amplifiers using FETs and bipolar transistors are Presented to show the feasibility of this particular network in low power Amplifier designs.
The process of the clutch(离合器)engagement(接合,啮合) when starting the automobile is introduced. The influencing factors of clutch engagement are discussed. The regular model of clutch engagement and the five – freedom dynamics model of the tow wheels of the bus are established.
A broaching line which produces a completely broached (linking) rod and cap every 12 seconds comprises two linked standard Cincinnati (company name辛辛那提) chain broachers, one a 30 by 114 and the other a 30 by 120 machine, with specially designed automatic loaders, locating devices and work transfer equipment.
But in factories and all other places where radioactive materials are used, great care must be taken to prevent anyone form being injured by coming too close to a strong radioactive source or by breathing the radioactive dust, for the rays form radioactive substances can be very dangerous.。
One no-bake approach, called the shell core process, is similar in principle to the shell molding process. Like shell molding, shell coring produces a hard, smooth and accurate surface. Sand, containing a thermosetting resin, is blown into a heated corebox. After a brief curing period, any loose, uncured sand is dumped out. The resulting shell core is hollow. Thickness of the core depends on the curing time: the longer the cure, the thicker the shell. Because the core is cured in the corebox, driers used in the oven-baking process are unnecessary. For shell coremaking, the corebox must be heated to 400—500°F. Hence the corebox must be made of metal.