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241. A grooving machine is developed to cut ring groove in round bar.

242. A self - fastening method is introduced by which a cleat - shaped crystal fixed in the swallow - tailed groove.

243. A practical mechanism for the core-pulling of inside groove was presented. The core-pulling was achieved by applying the deformation of helical spring steel sheet during the ejecting process.

244. Disigning coolant channel on the firebox of liquid rocket engine to loxodrome(equal-angle helix) groove can improve firebox coolant capability greatly.

245. The structure, wear resistance and wear mechanism of laser quenched layer on the groove surface of the piston head were studied in this paper.

246. In this paper, the water tightness and holding power of hydraulically expanded tube -to-tubesheet joints of heat exchangers with different groove width are investigated.

247. Our main products include deep groove ball bearings, thrust ball bearings, wheel bearings, clutch bearings,(http://sentencedict.com/groove.html) spherical bearing.

248. The design method of forming lathe tool for machining double T-shape rotor wheel groove was discussed in this paper and finally the keys for manufacturing are illuminated.

249. A comb plate is arranged in the middle groove chamber, sepharose is used to seal the running gel, and macromolecule sample components can be recovered from the running gel.

250. The blade of groove is designed with sawtooth, saving effort and durable.

251. Objective: To explore the effect of ad libitum flap of nasolabial groove on repairing the inferior lip defect.

252. The influence of the grinding plate groove shape on steel ball processing quality is briefly analyzed.

253. The bottom face of each tooth edge is processed with an inclined swallow-tailed groove combined with each tooth root or a stepped inclined swallow-tailed groove.

254. The paper adopts the numerical simulation method to discuss and analyze the stability of the spandrel groove high slope of a hydroelectric power station in the southwest China.

255. The results show that the reproductive system is composed of organ, copulatory pouch and ovarian groove.

256. Outer ring groove of curvature of the center and bearing center consistent, so with automatic self-aligning ball bearing the same tone heart function.

257. Ball bearing raceway groove - shaped, usually an arc - shaped cross section, the radius slightly larger than the radius.

258. Method: 4 cases with defect of alae the residual and flaps of nasolabial groove.

259. Feature: European groove , outside - swing, hinges, casement, awning and fixed windows.

260. Cleft lip and cleft palate range from a small notch in the lip to a groove that runs into the roof of the mouth and nose, possibly leading to problems with eating, talking and ear infections.

261. A convex rib is arranged on the edge of the clamp groove. The opening end of the main clamping plate is provided with an inclined part.

262. The plate for fixing the extraction column is inserted into a groove of the fixing frame and is provided with a via-hole.

263. The technology of precision roll forging by die groove machine driven plough share are researched systematically.

264. The support plate rotarily matches the annular groove of the socket wrench barrel, and a rotatable tripod with the hexagonal sleeve barrel as a center is formed.

265. To facilitate efficient lubrication, all multi-row full complement cylindrical roller bearings have lubrication holes, or an annular groove and lubrication holes in the outer ring.

266. The flame barrier, which locates into a groove in the cylinder head, reduces the stresses on the cylinder head gasket.

267. The results testing the, aluminum groove sample through IR Thermal Wave Nondestructive testing, argue that it is effective for this method to quantify the depth under the surface.

268. The most competitive products in GEB are Deep Groove Ball Bearing Cages and Tapered Roller Bearing Cages in high precision, no noise and longevity.

269. The structure characteristics and flow-model of throttling groove were analyzed, and the sound-pressure model of cavitation noise inside throttling valves was predicted.

270. Based on the model , a calculation system of intersecting pipe groove was developed.