BM stands for boyevaya mashina (Russian: боевая машина – combat vehicle), and the nickname grad means "hail". The complete system with the BM-21 launch vehicle and the M-21OF rocket is designated as the M-21 field-rocket system and is more commonly known as a Grad multiple rocket launcher system.

整個「冰雹」火箭炮系統由 BM-21 火箭發射車、「動物園」自動化火控系統和 9 種不同類型火箭彈構成，包括：9M22U、9M28F 和 9M522 高爆/破片殺傷彈；9M521 增強殺傷彈；9M28K 反坦克布雷彈； 煙霧彈 、 電子干擾彈；9M217 自導彈以及 9M218 聚能裝葯破甲子母彈等。 攝於1989年，一隊 蘇軍 的BM-21PD火箭炮列陣。 攝於2023年1月5日，一隊 俄軍 的BM-21PD火箭炮列陣發射火箭彈。 ^ Zabecki, David T. Rockets and Rocket Launchers. Tucker, Spencer C. (编).

The BM-21 Grad is a Soviet truck-mounted 122 mm multiple rocket launcher. The weapons system and the M-21OF rocket that it fires evolved in the early 1960s and saw their first combat use...

bm-21式火箭炮是前苏联研制的一种122毫米40管自行火箭炮。 该炮1964年开始装备陆军炮兵部队。 现摩托化步兵师和坦克师属炮兵团均编有一个БМ-21式火箭炮营，装备该炮24门。

整個「冰雹」火箭砲系統由 BM-21 火箭發射車、「動物園」自動化射控系統和 9 種不同類型火箭彈構成，包括：9M22U、9M28F 和 9M522 高爆/破片殺傷彈；9M521 增強殺傷彈；9M28K 反戰車布雷彈； 煙霧彈 、 電子干擾彈；9M217 自飛彈以及 9M218 聚能裝葯破甲子母彈等。 攝於1989年，一隊 蘇軍 的BM-21PD火箭砲列陣。 攝於2023年1月5日，一隊 俄軍 的BM-21PD火箭砲列陣發射火箭彈。 ^ Zabecki, David T. Rockets and Rocket Launchers. Tucker, Spencer C. (編).

The BM-21 Grad is a Soviet-designed multiple rocket launcher (MRL) system that has been widely used by numerous countries around the world. The system, developed in the early 1960s, is based on a 122 mm rocket caliber and has become one of the most recognizable and widely produced artillery systems of its kind.

2020年2月3日 · The BM-21S is a beveling machine designed to bevel stainless steel. The machine can bevel plates, as well as pipes with outer diameters of 150–300 mm (6–12′′), at an angle of 0–60° and with the bevel width of up to 21 mm (13/16′′). Also, the machine contains dampers to reduce vibrations.

BM-21 グラート（ロシア語: БМ-21 "Град" ベーエーム・ドヴァーッツァチ・アヂーン・グラート）は、ソビエト連邦が1960年代初頭に開発した122mm自走 多連装ロケット砲であり、ソビエト連邦軍及び現在のロシア連邦軍が使用しているほか、友好国への輸出も ...

The BM-21S beveling machine equipped with a low-speed motor is suitable for milling stainless steel plates and pipes. It can perform bevels up to 21 mm and allows continuously adjustable bevel angles from 0° up to 60°.

2022年6月10日 · Detailing the technical specifications, development, and operational history of the BM-21 (Grad) Multiple Launch Rocket System (MLRS) including pictures. The global defense reference actively compiled since 2003