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Vestil BOL-FD-36-Y Yellow Folding Bollard, Steel, 1-3/4" Diameter, 42" Extended Height: Safety Cones: Amazon.com: Industrial & Scientific
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Vestil 10 1/4" x 10 1/4" x 36" Yellow Steel Removable Safety Bollard BOL-RF-36-4.5 - 4 1/2" Diameter
![Transactions . should be noted right here that thestandard thread is cut much deeper than the blacksmith nicks hisbars. Without going into the mathematical work by which the factswere proved, it Transactions . should be noted right here that thestandard thread is cut much deeper than the blacksmith nicks hisbars. Without going into the mathematical work by which the factswere proved, it](https://c8.alamy.com/comp/2CJ472J/transactions-should-be-noted-right-here-that-thestandard-thread-is-cut-much-deeper-than-the-blacksmith-nicks-hisbars-without-going-into-the-mathematical-work-by-which-the-factswere-proved-it-may-be-stated-that-in-connection-with-the-armor-plate-investigations-already-referred-to-i-found-theoretically-firstthat-with-a-perfect-fitting-thread-it-makes-no-difference-in-regard-tothe-strength-of-a-bolt-thread-how-fine-it-is-made-since-the-lengthof-thread-increases-just-as-fast-as-its-strength-of-oross-section-dimin-ishes-second-that-with-such-a-thread-one-fifth-of-the-diameter-ofthe-bol-2CJ472J.jpg)