The babbitt adjustable Hammer-Blow Sprocket Rim is for use with hard to operate gate, globe and Angle valves in overhead locations.
对于高度超过头部，操作困难的闸阀、截止阀和角阀，可以采用巴氏可调节锤击链轮。
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If the Arab oil-weapon felt like a hammer-blow, this time stagnant oil output and growing emerging-market demand have squeezed the oil market like a vice.
After its discovery, some argued that even if the eruptions did not cause the extinction, they weakened the biosphere and made it particularly vulnerable to the Chicxulub hammer-blow.