This paper describes the application of UF-II bi rotor flowmeter and technical improvement of LJG-22 prover.

It is pointed out that the insulated-room method (the flowmeter is installed inside) can not prevent the prover from wax depositing,therefore,the hot water around 65 ℃ should be u.

Chemical cleaning for volume tube before demarcation;

This paper introduces the method of indicati ng value testing for the small volume tube flow standard device, and based on it s testing data, makes analysis and research on the standardizing method of the v olume tube, the results of which show that the standard value obtained from the small flow can be used in the big flow agreeing the requirement of the accuracy.

This paper has derived and verified that in sigle channel systems the dependence of sample dispersion on manifold volume can be expressed as a simple linear equation.

Organic sheets and layers of mineral crystals,whose form and thickness are stable,are found in the siphonal deposits.

In the paper,we give another proof of the volumn of tubes around smooth curves in R3 by using Gauss formula.

Cleaning method for standard volume pipe and improvement of its process flow;

The measurement error and economic loss rising from standard volume pipe during dynamic measurement of crude oil were analysed and some solutions were proposed.