Bazalt is a Russian armament company - probably one of the oldest, and without doubt the most active of all Russian bombs producers, above all on the export market - and have a wide range of products - I think that they have a catalogue on their web site.
These are photos from their 95 anniversary (they area active since 1916)
You can get much details on thiir bombs on the following forum:
http://zlata.rufor.org/forumdisplay.php?f=271
Russians unguided bombs follow formally the range 50/100/250/500/1000/1500/2000/3000/5000/9000 kg
Some are available in both high and low dag version, other only have a single version.
Due the use of same shape of bodies for frag, HE-frag and HE bombs, those bombs having with less exlosive content and heavier cases will be globally heavier, making for some odd weights - hence 270kg OFAB-250-270 - first number is nominal weight, 2nd number is real weight (if it is more then +/-5% of nominal one).
You can find drawings, cutaways and dimensions of bombs serially equipping the Soviet/ Russian air force at the following web address:
http://www.enci.ru/ФАБ
and of course the most interesting and detailed materail can be found at the russian arms forum
http://www.russianarms.ru/forum/index.php/board,792.0.html were all (almost) Russian/ Soviet bombs are reviewed in full details one after the other
Most Chinese bombs are copies/ improved copies of Soviet/ Russian models - the Chinese concept being not to invest on creativity but in copying and improving models that have proved themselves and mass producing them - from computers to bombs. They are very active on the export market, above all in African and Arab countries and of course among traditional customers such as Pakistan. To which extent such weapons serially equip the PLAAF itself is an open question.....
And manuals too 
