产品采用优质页岩为原料，经硬塑真空挤压成型，在隧道窑中用燃气恒定高温烧结而成。
With high quality shale as raw material, the products are extruded by hard plastic vacuum technology and sintered in tunnel kiln by fuel gas with stable high temperature.
检测系统不能像分级员一样按压或挤压鸡蛋。 然而，如果它们能够用极小的负压或真空把鸡蛋牵引起来，结果会怎样呢？
The detection systemcould not press or squeeze the egg like the graders did, but what would happenif they could pull on the egg with a slight negative pressure, or vacuum?
当引擎冷却时，通过出口软管吸入空气，在真空管产生吸气，导致柱塞向下挤压弹簧。
The engine, as it cooled itself, sucked in air through the outlet hose, producing suction in the vacuum chamber, and so drawing the plunger down and compressing the spring.
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