steel
when was steel invented
what is 1800 BCE
why was tea so popular in china
what is used for medicine
where was rocket technology developed
what is china during the song dynasty
when was gunpowered invented
what is around the 9th century
how did steel impact chinese construction
what is by high damage for powering massive residental
when tea farmers grow small tea trees or shrubs on high grounds how high do they plant it
what is usually above 4,000 feet
when was rocket technology heavily influenced by the goverment
what is 1990
why did the moveable type help books
what is it enable the mass production of books
what is gunpowered
what is the earliest known chemical explosive, traditionally composed of a mixture of potassium nitrate (saltpeter), sulfur, and charcoal.
what was some challenges that Chinese construction faced due to early production of steel
what is severe margin pressure from fluctuating price
For several of years how was the made
when was rocket technology was created
what is the 10th century
The moveable type was later refined by Gutenberg in ______.
who was the first one who used gunpowered
what is Chinese alchemists
what is a versatile, man-made alloy primarily composed of iron
when did the Europeans became involved in the tea farming and trade
what is 18th century
what is rocket technology
what is essential for space exploration communication of NASA
what did the moveable type help mostly everybody with work
what is helps printing tech inter changeable metal.
__________ made gunpowered
what was steel first used for
what is for creating superior weapons, armor, and tools
when was tea invented
what is 2700BCE
what is saltpeter,charcoal,and sulfur
what is clay,iron,and ink to make moveable type.
what was gunpowered used for
what is rockets,cannons, firearms, bombs, fire arrows, and mines