Catalogue record · hackernews
Calculate materials, compare practical layouts, visualize the result, and get a planning-level cost estimate before you buy. Powered by the Smart Fence Optimizer.
Smart Fence Optimizer 帮你计算材料需求、比较布局方案、预估造价，在购买前就能看到效果。
Seen on hackernews · last checked 2026-10-22.
The teardown — how it actually charges, which mechanism was found, and the seam worth taking — is in the daily letter. This page carries the record and the signals so search engines and link previews have something real to read; the judgement stays with the readers who asked for it.
Get the daily letterThe same record sits in the full catalogue, where every entry can be searched and filtered by the signals above.