多名业内人士透露，美国航天及半导体企业的供应商正面临日益加剧的稀土短缺压力，其中至少两家企业已开始谢绝部分客户订单，此时距离美国总统特朗普计划赴北京与中国国家主席习近平举行峰会仅剩数周。
Нина Ташевская (Редактор отдела «Среда обитания»)
，详情可参考新收录的资料
Teflon spacers sliding over each other, but ensure as shown in the second image about a mistake that we did using a very small teflon disc which led to imbalance issues. The red regions have been marked to highlight supports that need to be ensured.
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