According to ZBJ65015-89 standard about noise level testing method of woodworking toot, the noise testing for MJg0# and MJCl125 precision panel saws was conduct
The values of non-marketable forest products have largely been ignored, which made the conservation of the natural resources increasingly more economically diff
As the largest pool of terrestrial organic carbon, soils interact strongly with atmosphere composition, climate, and land change. Soil organic carbon dynamics i
Embryo of lilacs (Syringa L) culture in vitro and the rapid propagation were studied. The orthogonal experiments, including the selection of basal medium, embry