Chen Chuangtian
... that until at least 2009, Chen Chuangtian's laboratory was the only one in the world that could make the nonlinear optical crystal KBBF?
... that until at least 2009, <b id="mwBe0"><a href="./Chen_Chuangtian" id="mwBe4" rel="mw:WikiLink" title="Chen Chuangtian">Chen Chuangtian</a></b><span about="#mwt67" class="nowrap" data-mw='{"parts":[{"template":{"target":{"wt":"`s","href":"./Template:`s"},"params":{},"i":0}}]}' id="mwBe8" typeof="mw:Transclusion"><span typeof="mw:Entity">'</span>s</span> laboratory was the only one in the world that could make the <a href="./Nonlinear_optics" id="mwBfA" rel="mw:WikiLink" title="Nonlinear optics">nonlinear optical</a> crystal KBBF?