影视在线观看少妇无码,大芭蕉蕉国产线视频免费,国产无套白浆东北老女人,美女足脚交一区二区三区,好看的最新的国产的视频,日本熟日本熟妇中文在线,A级猛片在线观看免费,国产偷窥在线真人视频,日本丰满熟妇人妻免费,人人妻人人爱人人舔

Tianyuan is lost wax precision casting co. We have automatic production line and completed texting method, we also supply all Kinds machining for our casting parts. The inspection instruments including the SPECTRO spectral analysis, X-ray crack detection, magnetic particle detection, ultrasonic flaw detection and 3D size examine etc. The final products have high quality standard. The casting surface roughness is Ra1.6—6.3.