Avoid building up "Remove Instance" features. If using a pattern, edit the original pattern to remove the part. Avoid unnecessary references between components. Use origin reference planes or workplanes based on the origin rather than convenient but illo...
several types of fire extinguishers have been invented. They must be ready for immediate use when fire breaks out. Most portable (手提式的) kinds operate for less than a minute, so they are useful only on small fires. The law requires ships, trains, buses and planes to carry extinguishers...