China turns out its self-developed tunnel boring machine with biggest diameter
Manage episode 449672824 series 1105722
①China, Canada to increase direct flights to satisfy travel, trade demands
②Robotic grippers designed to handle delicate living things
③China turns out its self-developed tunnel boring machine with biggest diameter
④Rare flying squirrel species found in China's Xizang
⑤A Thousand Whys: Why could hot pot solve everything for Chinese?
121 episod