This thesis,from a unique aspect,concentrates on the symbols of wild chrysanthemum,full moon,holes and lily flowers printed on the quilt,which demonstrate praise to human beings:the beauty of human feelings and human sensibilities.

Package yarn, when bleached by the special oxidative bleaching agent 197, can reduce looming holes, losses, and color difference between layers after dyeing.

Comparing with the traditional patching method of using small plates and L-bolt with the help of chain hoist, this technique deploys a complete steel plate and chain block to patch a big hole underwater, which would reduce the workload of the divers, improve work efficiency, and ensure the structural strength as well as the water tightness after completion.