The progress in field-portable and miniature mass spectrometry (MS) are reviewed, including the miniaturization efforts of various mass analyzers, the advancements of direct sample introduction and atmospheric-pressure ion source on in-situ fast analysis application, and the fabrication technique achievements of small vacuum system and ion detection.

A kind of miniature Rogowski coil which measures high frequency and heavy current is introduced,and the principle of work of Rogowski coil is analyzed.

Based on analyzing assembly process characteristic of miniature military moulded case circuit breaker(MCCB),an assembly CAPP system for miniature military MCCB was developed.

Simulation of small-scale natural gas liquefaction flows in skid-mounted package;

Overall Design for Small-scale Rice Binder Supported with Hands;

This paper introduces with emphasis the process, characteristic, and related technique of small-scale multi - function polyester unit designed by the Institute of Urumuqi Petrochemical Complex and the Chemical Fibre Research Institute of Tianjin.

The management of farmland which super-small scaled and scattered originates from the scarcity of soil resonces and contradiction between mass population and rare lands, as has set a serious barrier for agricultural growth.

New Concept of Applied Small Car;

From the stand point of view of China's present rural economical state, the changeable weather conditions and the goal of keeping grain quality etc, it illustrates the necessity and feasibility of developing and popularizing small grain driers for agricultural application.

This article introduces the design requirement,the design calculation and the prototypical performance of a small electric car.