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External sources (not reviewed)

可选购的圆形带锁尼龙或不锈钢手柄成套件内包含一个手柄, 锁罩, 扣环, 标签, 垫片, 锁紧螺母和说明书。 swagelok.com.cn	Optional round lockable nylon or stainless steel handle kits contains a handle, lock shield, retaining ring, [...] label, washer, lock nut, and instructions. swagelok.com.cn
应检查确认所有螺纹连接处是否已紧固且无泄漏。 graco.com	Check to be sure all connections are tight and leak-free. graco.com
提升单向阀是依靠重力来动作的、故必需水平地安装、阀帽螺母在上部。 swagelok.com	The lift check valve is gravity assisted and must be mounted [...] horizontally, with bonnet nut on top. swagelok.com
在重新组装时，应始终使用 ISO 泵用油或黄油来润滑螺纹零配件。 graco.com	Always lubricate threaded parts with ISO [...] pump oil or grease when reassembling. graco.com
但如果伴随着更高的燃料效率，例如通过改进船体、螺旋桨和齿轮设计，这类投资会很快被补偿。 fao.org	However, if accompanied by greater fuel efficiency, e.g. through [...] improved hull, propeller and gear design, [...] this investment could quickly be recouped. fao.org

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