| 摘要 |
<p>A fishing sinker made of metal coated with a material which is resistant to water and which material has a mechanical strength such that the sinker is substantially protected from delivering material to the water, when in use. Such a sinker limits the amount of metal introduced to the marine environment by chemical processes and rather is coated in a material which can be impregnated with fish oils or other such substances which attract fish.</p> |
