Amazon S3 on MSN
How to build a high performance rocket launcher using PVC pipes
The science experimenters at TKOR demonstrate how PVC pipes can be engineered into a powerful launcher capable of firing ...
Amazon S3 on MSN
How to build a durable high performance bow using PVC piping
The science experimenters at TKOR reveal how to assemble a tough and efficient bow using PVC piping as a surprisingly capable ...
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