Brief introduction about EN1870-1:1999 "Safety of woodworking machines Circular sawing machines-Part 1: Circular saw benches (with and without sliding table) and dimension saws" (PartⅢ)
Brief introduction about EN1870 -1:1999 "Safety of woodworking machines-Circular sawing machines - Part 1: Circular saw benches (with and without sliding table) and dimension saws" (Part Ⅳ)
There was a curve of line regression relationship between fresh velvet weight and the sawn age, the regression equation was Y = 1.457 + 0.469X(Y: fresh antler weight, X: thesawn age),the correlative parameter r = 0.9867(P<0.01);
(2) green sawn timber of rubber wood can be treated with 2% TWP by vacuwm pressure or oscillating pressure methods and an enduring protection effect will be obtained with a retention dose of TWP in wood no less than 3.7 kg/m3;
Through the unified inspection on log and sawn timber of state enterprises in nine provinces, the results showed that the average percent of being qualified for dimension, grade and qualification batch of log and sawn timber were 94.13% and 87.62%, 98.78% and 98.55%, 88.50% and 92.8% respectively .
Consideration was given to calculations of the parameters of transition between two opposite-magnetization domains in a thin-film working layer of the hard magnetic disk with regard for the saw-toothed form of transition.
The results of an experimental investigation of the interaction of finite-amplitude saw-tooth sound waves (with a sound pressure level of 170 dB) with an axisymmetric supersonic air jet are presented.
All of these objects were produced through simple processes involving solid drilling, riffling, and sharp point abrasion; and no evidence was found for the use of rotary tools for incising or sawing.
Four wear modes and four wear mechanisms of diamonds in saw blades are identified in a study of varied segments damaged in field operation of sawing hard stone.
A modernized unit of the ShP-2 sawing machine for vibroshock sawing of hard and brittle materials in three modes of vibrodrive operation has been described.
Therefore, it is very important to evaluate the vibration properties of the board in the round, especially for the sound radiation characteristic of radial sawn timber and its relationship to longitudinal sawn timber.
However, for the national and international experts, researches on radial sawn timber and its role and function in sound emission have not yet been developed.
1. An account is given of ten species of copepods collected from four lakes, Ching Hai (Chinghai Province), Tai Hai, Huangchi Hai and Ulasu Hai (Inner Mongolia) with description of three new species, namely, Arctodiaptomus spirulus (p1.Ⅰ, 5-7), Bryocamptus fed (pLs. Ⅳ & Ⅴ), from Ching Hai and Neutrodiaptomus genogibbosus (pL. Ⅱ, 11-14) from Ulasu Hai. A brief description of the larvae of an Argulus (Copepoda Branchiura) from Ulasu Hai is also included (pL. Ⅵ).2. The copepods so far found in Ulasu Hai are mo...
The kinematics and dynamics of the let-off motion mechanism on toyoda looms in G type is discussed. In Fig. 4 is given the relationship of the turning angles of the friction ratchet wheel (α) and the moving distance of the connecting rod (y) at different warp beam diameters of d. In Fig. 9 is given the relationship of the warp tension from the back rest at different warp beam diameters of d. In equation 14, it is proved that when the guiding-warp roller and the warp beam pushing lever are used the range of ...
A general discussion is made on the geographical distribution of the 62 known speciesof termites occuring in China. The termite distribution in China is divided into 5 re-gions according to the indicator species, which are the most widely distributed and thebiologically specialized termites, i.e.: Reticuliteimes spp., Odontotermes formosanus, Copto-termes formosanus, Kalotermitidae and the mound-building termites (Macrotermes an-nandalei, Odontotermes yunnanensis, Globitermes audax and Microcerotermes burma...
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