Micro pressure sealed structure to make soft and tasty rice.
微压力密封结构，煮出的米饭松软可口。
A micro pressure key switch used for the electric running machine is provided.
一种可用于电动跑步机的微压力按键开关。
The structure and calibration theory of a constant pressure gas micro-flowmeter are introduced.
介绍了恒压式气体微流量计的组成和校准原理。
The structure and calibration theory of a constant pressure gas micro-flowmeter are introduced.
介绍了恒压式气体微流量计的组成和校准原理。
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