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Wysłany: Pon 3:19, 13 Gru 2010
Temat postu: ugg boots billig Zero test drive _4480
Zero test drive
Quasi-hole diameter is lJmm. The remaining work of the thermometer jack plug hole called the test. Diameter 18ram, to meet the work is great with a glass thermometer outside diameter of 17ram requirements. Each jack has a spring touch beads, stainless steel spring material. Helical circular spring diameter 4ram, test hole spring length 25mm, standard length of the spring hole 20mm. In the test. (A circle in the EL, with the sharp corner where the radius of the Peach jack direction by the outer wall jack - ~ vl the following from the disk surface, drill a 2mm diameter 5ram, deep l3ram cylindrical hole, one end of the spring constant outer disk in a cylindrical hole through one end, and the other side with the inside diameter of 4 ~ soil 0.5mm, length 13ram leather sleeve of thin stainless steel trap, the sleeve open end fixed to the spring, the sleeve is a round flat end. In its on the sticky end with a piece of the same size lmm thick high-density non-absorbent sponge, so that when spring withstand vitreous thermometer. phase surface is a soft surface. At this point the spring stretched the length of the test hole is 13ram, to ensure that secure the small diameter vitreous thermometer. spring force to secure the thermometer will not fall Ru Duwa bottle, twitching a little harder to be appropriate when the thermometer. Each jack following a long 1Omm there ... and the inside diameter of the same hole diameter, shape the same stainless steel cylinder 2, the inner surface of the cylinder surface with the jack in the same plane. and with the Lian fixing the upper surface of the vertical, so that the thermometer inserted in a vertical state. At this point the thermometer inserted from the outer edge of the Dewar bottle wall has also recently 22ram, fully meet the test procedures for inserting the thermometer from the wall not less than 20ram from the certification requirements in the center of 48ram disk radius circle round to the middle of the two test holes at the center, installing an outer diameter of the round 20ram Level 3, in order to maintain zero when the test plate test surface at the level of Pu state. in the test disk from the disk surface, the radius of circle center 80ram evenly distributed round the four mentioned handle 4. to make from the ice water. Wu Yi Si Port 0 is called a zero measurement technology 1993.No4 crisp plate and the small boat j test surface to maintain the level of fur. to mention the handle is hard plastic wood, and the question drill air,
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, bolted to the test plate t. Du inside diameter of the bottle is 200ram. zero outside diameter test disk (including sponge) is 200ram. Rudu Wa put the bottle tightly. When the test tone level disk placed in Dewar flask, the center hole can be used to ridicule add crushed ice and ice water mixing to maintain the same zero, zero temperature test drive after the basic need to re-adjust. zero test can test a working disc 1] Supported operating temperature juice. dewar placed on the table, around town in a row reading, maintaining the continuity of work, enhance the test's accuracy has greatly improved under the effect. electric bending testing machine does not force values on the scale when the scale of force intended to root value test sheets (Luoyang City of Measurement and Testing) electric bending testing machine is used to determine the rectangular specimens of cement mortar flexural strength testing machine. According to ~ JJG476-86 electric bending testing machine test procedures, \accuracy. but in the electric bending testing machine force value to the process of legal units of measurement. a small number of units purchased did not force value (N) scale only strength (MPa) scale and the scale of the force value of the restructuring. thereby accounting department of the electric bending testing machine verification difficult. It _ wide solution, the majority of such cases into account star sector test result can not be refused Yu. small force measurement department to find out the value and strength of the corresponding system for checking to cry in order to reduce the burden on enterprises, electric bending testing machine to ensure the accuracy of the electric power values of bending strength test machine corresponding relationship is as follows,
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, no mountains on the ruler for the value of testing the degree of electric Jing reference bending test machine. When rectangular specimens of cement mortar After a force P (Figure). specimen bending moment is: M = G ~ / 2) × (L / 2) PL / 4 (1) bending strength at this time: we l-M / w (2) where the maximum bending moment by the time the sample; Ⅳ a sample ●, Fig standard hole cross-section flexural rectangular cross-section when the coefficient = / 6, then a ~ / bh2 a P (3) where L-0.1m. 6 A = 0.04m side of the 3 × 0.1m Duo Li a 2343.7 / m (4) by (4) shows that, just make sure the power P is too small,
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, you can find the corresponding bending strength blush. P-lkN time,
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, = 2.34375MPa. ? 2 ? designed in scale, the general lkN corresponding 2.34MPa,
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, we follow such a correspondence, to find out lkN force and its multiple values of flexural strength of the corresponding location of the electric bending testing machine can force value test .
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