bw造句
31. Note:two-blade ball valve has two connection ways of butt-welding(BW)and socket welding(SW), and may be equipped with the bracket and lock device in conformity with ISO.
32. On a body weight basis, this is equivalent to 0.8 and 0.4 mg/kg bw/day at the average, and 1.7 and 1.0 mg/kg bw/day at the 95th percentile.
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