https://padlet.com/ngoviethoang1610/bai7j4r6se4jfs4k en-us 2022-09-19 10:18:28 UTC 2024-04-01 09:07:11 UTC hello@padlet.com ngoviethoang1610 https://padlet.com/ngoviethoang1610/bai7j4r6se4jfs4k/wish/2302736260 To have an effective presentation, your presentation should have at least 3 parts: Introduction, body and conclusion. You should also choose your presentation style according to photo or video slides. After that, you need to practice speaking in front of a mirror about facial expressions and body movement. You can also present in front of your friends and get feedback and comments. When giving a presentation, you should be cheerful and able to walk down to the audience to create a friendly atmosphere. Do not block the projection screen as it will lose visibility. When finished, thank the audience and be ready to receive questions from the audience. You should also thank the person who asked you the question in case you do not know the answer, admit that and promise to proviede the answer later.

]]> 2022-09-19 10:22:05 UTC https://padlet.com/ngoviethoang1610/bai7j4r6se4jfs4k/wish/2302736260 ngoviethoang1610 https://padlet.com/ngoviethoang1610/bai7j4r6se4jfs4k/wish/2302912415 2022-09-19 12:49:13 UTC https://padlet.com/ngoviethoang1610/bai7j4r6se4jfs4k/wish/2302912415 ngoviethoang1610 https://padlet.com/ngoviethoang1610/bai7j4r6se4jfs4k/wish/2321761169
There are 2 main kinds of bearings: rolling contact bearings and journal bearing. Journal bearing have NO rolling parts and the shaft rotates inside a lubricated sleeve instead. Unlike journal bearings, rolling contact bearings use rollers to support loads. It has inner race and outer race. Inner race rotate with the shaft and outer race remain stable relative to the shaft. Rolling contact bearings consist of 4 types including Ball bearings, Straight roller bearings, Tapered roller bearings and Thrust roller bearings. Ball bearings use spherical rollers to support radial and axial motion. Straight roller bearings used cylindrical rollers to support radial motion. Tapered roller bearings use conicaling rollers for supporting radial forces and moderate thrust forces. Thrust roller bearings use barrel-shaped rollers for supporting thrust motion.

]]> 2022-10-01 03:01:29 UTC https://padlet.com/ngoviethoang1610/bai7j4r6se4jfs4k/wish/2321761169 ngoviethoang1610 https://padlet.com/ngoviethoang1610/bai7j4r6se4jfs4k/wish/2378141207 2022-11-10 06:58:20 UTC https://padlet.com/ngoviethoang1610/bai7j4r6se4jfs4k/wish/2378141207