An introduction is made on the measure procedure of dust content and water content in the dusting system of converter by using TH-880IV microcomputer dust parallel sampler, continuous measure technique by multi samplers (measure of dust) and constant sample absorption technique(measure of water).

By encouraging the students active thinking physically and mentally, and using proper programmatic knowledge to guide the exercise, we may improve the results of the teaching of javelin skills.

In this paper we also Introduce a continuous bath temperature measurement technology, by using a chromel - alumel thermocouple in a steel protection tube with plasma coated spinel ZnAl2O4(or ZnFe2O4) surf ace lay.