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In Japan, the male sizes are often designated as DTC-20, DTC-27, DTC-40 (discontinued) and DTC-45 corresponding to a respective screw head size of 3.2 mm, 4.6 mm, 6.4 mm and 7.7 mm; with the size of the screw measured across the widest portion of the mating part of the head. The most common sizes in use for consumer electronics are DTC-20 and ...
Coordinative chain polymerization: With Ziegler–Natta catalyst TiCl 4 /Al(i-C 4 H 9) 3, a more pure cis-1,4-polyisoprene similar to natural rubber is formed. With Ziegler–Natta catalyst VCl 3 /Al(i-C 4 H 9) 3, trans-dominant polyisoprene is formed. [4] 1,2 and 3,4 dominant polyisoprene is produced MoO 2 Cl 2 catalyst supported by phosphorus ...
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The male connector is hand-tightened (though versions with a hex nut are also available) and has an air gap between the center and outer conductors. The coupling has a ⅝-24 UNEF thread. Amphenol suggests tightening to a torque of 15 inch-pounds (1.7 N⋅m), [2] while Andrew Corporation suggest 20 inch-pounds (2.3 N⋅m) for their hex nut ...
While pipe sizes in Australia are inch-based, they are classified by outside rather than inside diameter (e.g., a nominal 3 ⁄ 4 inch copper pipe in Australia has measured diameters of 0.750 inches outside and 0.638 inches inside, whereas a nominal 3 ⁄ 4 inch copper pipe in the U.S. and Canada has measured diameters of 0.875 inch outside and ...
Poly Technologies (Chinese: 保利科技有限公司), sometimes abbreviated as PolyTech, a subsidiary of China Poly Group Corporation, is a trade company with headquarters in Beijing, China. The company deals with missiles and other military products.