420 sailboatmastsailing loadsshroudsstrain analysisAim of the work was the experimental strain analysis of a 420 sailboat mast during sailing: this type of data is of great interest in the structural design of sailboat masts and hulls as well as in the sail-making. The work involved the ...
Researchers from Canadian universities examined 25 years of official crash data from the United States, comparing the cases that happened after 4:20 p.m. on April 20 with the ones on control days from 1992 to 2016. The "420 marijuana day" is popular mainly in the United States and Canada....
除固定资产、电商采购及一揽子商城（一级消耗）物资外，其他需经资源服务中心仓库办理出入库手续的物资送货前，通过城轨采购网或资源服务中心指定形式进行预约。对于供应商未进行预约送货或送货资料不齐全、型号数量不相符、包装及产品质量有问题的物资，资源服务中心有权拒收。